
The Tsar Bell is a monument of Russian bell casting art of the 18th century. The height with the jumper is 6.24 m, the diameter is 6.6 m; weight 202 tons. It has never been used as intended. The bell was cast by order of Empress Anna Ioannovna in 1730 in memory of her descendants of her reign. In 1737, during the Trinity fire, it was damaged and lay in the ground for about a century. In the first half of the 19th century, it was raised and installed on a pedestal in the Moscow Kremlin near the Ivan the Great Bell Tower.
The Tsar Bell, known in our time, had several predecessors. The 
		first, the Godunov bell, was cast in 1599. It was located on Ivanovskaya 
		Square in the Kremlin. The bell surprised both local residents and 
		travelers from other countries with its size and beauty - it weighed 
		33.6 tons. The bell served for almost 50 years, but broke due to a 
		strong fire in Moscow.
In 1651, they started talking about 
		casting a bell weighing 130 tons. Tsar Alexei Mikhailovich wanted to 
		entrust the work to Hans Falk, but Falk asked for five years to complete 
		and did not want to use the copper from the broken bell. Moscow masters 
		- Danila Matveev, his son Emelyan Matveev, assistants Kirill Samoilov, 
		Vasily Borisov and Semyon Simonov - were ready to do a similar job in a 
		year and using old copper. The bell was cast in 1654, using, among other 
		things, the metal of the previous one, and in December of the same year 
		it already rang from the bell tower, its sound spread over a distance of 
		up to 7.5 kilometers. This bell soon broke from a strong blow with the 
		tongue, and in 1655 Alexander Grigoriev took up recasting it. The master 
		worked on the bell for ten months, from February to December. In 1661, 
		the bell fell to the ground, but remained intact, and in 1674 it was 
		hung up again. The second bell almost repeated the fate of the first - 
		it crashed in 1701 due to a fire, having served for almost 50 years.
In 1730, Empress Anna Ioannovna wished to leave the memory of her 
		reign and ordered the broken Grigoriev bell to be recast.
The 
		decree of July 26, 1730 read:
Later, in the past years, by Decree of 
		the blessed memory of the grandfather of our Grand Sovereign Tsar and 
		Grand Duke Alexei Mikhailovich, a large Bell was built for the 
		Assumption Cathedral, in which the weight of eight thousand pounds and 
		this Bell was damaged by fire, for this reason, we, jealous of the will 
		of our ancestors, indicated that the Bell should be poured again with 
		replenishment, so that it contains ten thousand pounds in the 
		decoration, and for casting that Bell, take copper from the Berg 
		Collegium and from the Mint, where a decent one will appear, and take 
		tin from the Artillery, and buy all sorts of supplies and hire real 
		workers at a price; what about this entire departure and the raising of 
		that Bell is due to the monetary treasury, which is now available for 
		the expenses of the Preobrazhensky Order; and that dispatch should be in 
		the Artillery, and order that it should take place with all diligent 
		diligence soon and supplies would be bought in advance.
Decree of 
		July 26, 1730
This time the weight of the new bell was to be 200 
		tons. At first, they were looking for specialists abroad to complete the 
		task. The Frenchman Germain, the royal mechanic, "royal goldsmith and 
		member of the Academy of Sciences", received a generous offer, but 
		decided that it was a joke and refused to complete the task. Ivan 
		Fedorovich Motorin and his son Mikhail Ivanovich got down to business.
		
Little is known about Ivan Motorin. Date of birth not clear. In 
		1686, he inherited from his father, Fyodor Dmitrievich Motorin, a 
		foundry on Sretenka, became its owner, and, together with his brother 
		Dmitry, continued the bell-casting business. Information about 12 bells 
		made by Ivan Motorin has been preserved, of which two more are in the 
		Kremlin: Great Lenten (1704) and Nabatny (1714).
The bell was 
		planned to be cast according to the drawings from the Artillery Office. 
		First, Motorin made a small model and sent it with drawings and 
		estimates to St. Petersburg for approval. Discussion of the project and 
		preparation for implementation took two years. In November 1732, to a 
		request from the Senate about the progress of work, Motorin “answered 
		that the blanks would be made from June 29 in two and a half months, 
		from September 15, the manufacture of the casing would begin, and the 
		mold would be ready for casting by December 13.” Work on the bell began 
		in January 1733. Due to the huge size of the Tsar Bell, they decided to 
		immediately make it in the Kremlin. A hole ten meters deep was dug on 
		Ivanovskaya Square, and the space between the bell shape and the walls 
		of the foundry pit was covered with earth and rammed so that the casing 
		could withstand the pressure of the molten metal. Four casting furnaces 
		were stacked around the casting pit and a casing lifting device was 
		installed. Each furnace contained up to 50 tons of metal, from the 
		furnace it entered the casting bowl of the mold through special brick 
		grooves. Since there was not enough metal from the old bell, Motorin 
		requested an additional 5 tons of tin and 16 tons of copper.
On 
		November 26, 1734, permissions were received, a solemn service was held 
		in the Assumption Cathedral and received a church blessing, after which 
		metal smelting began. At work directly in the Kremlin, 83 workers were 
		employed, and in total, almost 200 people worked on the bell.
		Difficulties immediately began at work. There were already 94 tons of 
		copper in the furnaces, later another 21 tons were added. On November 
		28, tin and copper weighing 33 tons were loaded into the furnace. And 
		after 43 hours of operation of the furnaces, they found that two of them 
		were lifted by the hearths (the horizontal lower surface in the furnace 
		furnace) and the copper was gone. Repairing furnaces "on the go" almost 
		led to a fire and a subsequent stoppage of work. The craftsmen decided 
		to melt the remaining metal in two furnaces and add 106.5 tons of tin 
		and copper. For this, 600 bells weighing 27 tons, 68 tons of cannon 
		copper and 11 tons of tin were brought from the cannon yard. On November 
		29, the situation with stoves worsened. In order to prevent leakage of 
		copper, the molten metal was released into spare furnaces and started 
		repairing the furnaces. At the same time, it was discovered that the 
		machine for lifting the bell-shaped casing was on fire. It was not 
		possible to quickly put out the fire, because of this the bell shape was 
		damaged. It had to be dismantled to check the condition and fix the 
		damage. The next day, Ivan Motorin gave a written explanation of what 
		had happened.
Ivan Motorin died less than a year after the start 
		of work - on August 19, 1735, and the work completely passed to his son 
		Mikhail. Under Mikhail, foundry workers remained - his father's serf 
		Gavril Lukyanov "son of Smirnaya" and the townsman of Ogorodnaya Sloboda 
		Andrey Fedorov "son of Molyars". Reports testify to the increasing pace 
		of work: from October 6 to October 12, 57 people were employed, the next 
		week - 85, then - 114, and from October 27 to November 2 - 166.
		By the beginning of the new casting, taking into account fire prevention 
		measures, another 400 people took part in the work. On November 23, 
		1735, the furnaces were lit again, and after 36 hours of melting, copper 
		was fired into a bell shape. Casting took 46 minutes, 7 tons of metal 
		were delivered every minute. The casting was completed in two days. The 
		height of the bell was 6.24 m, the diameter was 6.6 m, and the weight 
		was about 200 tons. When the metal cooled, work began on applying 
		decorative ornaments and inscriptions. At that time, they could not get 
		a huge bell out of the casting pit.
For the casting of the Tsar 
		Bell in 1736, Mikhail Motorin received a reward of 1,000 rubles and the 
		rank of foundry workshop master.
On the surface of the bell, the 
		masters applied bas-reliefs with images of Tsar Alexei Mikhailovich and 
		Empress Anna Ioannovna. There are also images of Jesus Christ with the 
		Virgin Mary, the apostles Peter and John the Baptist. The engraver 
		responsible for the decor was the master Fyodor Medvedev.
On June 9 (according to the new style), 1737, the Trinity Fire 
		occurred in Moscow, which was considered great until the fire of 1812. 
		According to the generally accepted version, during this fire, a wooden 
		building over a pit with a bell caught fire, burning logs began to fall 
		into it. During the rescue, the bell fell from special bridges, which 
		then cost 62 thousand rubles, gave 10 longitudinal through cracks, and a 
		piece weighing 11.5 tons broke off from it.
Versions of the 
		appearance of the fragment
When the Trinity fire began, the chased 
		work was coming to an end. The bell was filled with water so that it 
		would not melt, but uneven and rapid cooling led to the formation of a 
		dozen cracks and a fragment.
The fragment could appear after the fall 
		of the bell during the rise.
The bell could crack due to 
		technological errors in casting, which were attributed to a fire.
The 
		bell was hung up and fell down during the fire
Modern research 
		has cast doubt on the fact that the ductile bell-bronze bell was 
		shattered during a fire, and suggest that the cracks were caused by 
		faulty technology. The version is also supported by the fact that the 
		bell stood on the grate after the fire - it could not have fallen so 
		exactly in the same place that it occupied after low tide. Therefore, 
		most researchers believe that the bell was not taken out of the pit - 
		they repeatedly and unsuccessfully tried to raise it after the fire.
		
The broken bell remained in the ground for almost a hundred years, 
		as it was considered too heavy. In 1792 and 1819, unsuccessful attempts 
		were made to raise the bell, and in 1821 the pit was cleared and 
		enclosed with stairs and railings. Tours were organized for those 
		wishing to see. There were projects to raise the bell and restore it by 
		soldering. Projects were rejected because of the high cost and fear that 
		it was impossible to solder an 11.5-ton piece with a guarantee of 
		maintaining a normal sound. Therefore, the bell has been preserved in 
		the form in which it was removed from the pit in 1836.
The project for lifting and installing the bell on the pedestal was 
		developed by the architect Ivan Mironovsky in 1827-1831. The French 
		engineer Auguste Montferrand was commissioned to carry out the project. 
		It took six months to prepare. The first ascent ended unsuccessfully: 
		due to the gravity of the bell, four ropes burst at different times and 
		one of the blocks broke. The workers had to put logs under the bell and 
		return it to its original place. For the second attempt, new ropes were 
		ordered, the number of gates was increased to 20. On July 23, 1836, the 
		second rise of the bell began, it lasted 42 minutes 33 seconds. When the 
		bell was raised, the pit was covered with a platform of logs, skids were 
		placed on the skating rinks and the bell was lowered onto them. In three 
		days, the bell was moved and on July 26 (according to the old style) was 
		installed on a pedestal next to the bell tower of Ivan the Great, where 
		it is currently located[1]. Since that time, the bell has become one of 
		the main Russian sights. The bell was placed on a pedestal trimmed with 
		white stone (designed by the same Montferrand), inside - red brick. A 
		commemorative plaque with the text was fixed on the pedestal: “This bell 
		was cast in 1733 by order of the EMPRESS Anna Ioannovna. He remained in 
		the land for a hundred and three years and by the will of the most pious 
		SOVEREIGN EMPEROR Nicholas I was appointed in the summer of August 1836 
		on the 4th day. Montferrand crowned the bell with an orb - a symbol of 
		royal power, thanks to this orb the bell received its nickname "Tsar 
		Bell".
In the autumn of 1979, the Tsar Bell was restored - it was 
		cleaned of late paintwork, which made it possible to study the relief 
		decorations.
Modern technologies make it possible to produce a 
		larger bell. But when such a bell is struck, most of the waves will be 
		in the infrasonic spectrum, which can cause anxiety and even panic in 
		people and animals. Studies show that the optimal weight for heavy bells 
		is 32 tons.
According to the analysis of the laboratory of the mine corps, the alloy of the Tsar Bell contains 84.51% copper, 13.21% tin, 1.25% sulfur, later revealed another 0.036% gold, which corresponds to 72 kilograms, and 0.26% silver, which corresponds to 525 kilograms.
In the mid-1980s, some deformation of the pedestal was 
		noticed, as a result of which there were fears about the possible growth 
		of cracks in the bell. At the request of the Minister of Culture of the 
		USSR, and in accordance with the instructions of the Minister of Defense 
		of the USSR, the Military Academy named after F. E. Dzerzhinsky (now the 
		Academy of the Strategic Missile Forces named after Peter the Great) was 
		instructed in 1986 to carry out a set of works on the restoration and 
		preservation of the Tsar Bell. The real state of its cracks was assessed 
		using the acoustic emission (AE) method. To carry out AE diagnostics of 
		the bell, employees of the Research Institute of Mechanics and Applied 
		Mathematics of the Rostov State University (NIIM and PM RGU) were 
		involved under the guidance of the head of the AE laboratory, Ph.D. S. 
		I. Buylo. From the Academy F. E. Dzerzhinsky, these works were provided 
		by the colonel, Ph.D. n. A. I. Gnevko. Diagnostics of the Tsar Bell was 
		carried out in two stages with the help of an instrumental AE complex of 
		our own design brought from Rostov-on-Don.
At the first stage, 
		the parameters and features of the AE radiation of the bell material 
		were studied. This part of the work was carried out on the territory of 
		the Academy. F. E. Dzerzhinsky when testing specially made large-sized 
		(more than 10 cm thick and weighing about 100 kg) samples from a bronze 
		alloy, identical to the material of the bell. On the second stage, 
		already in the territory of the Kremlin, work was carried out on 
		acoustic calibration and diagnostics of the Tsar Bell itself. The work 
		on the bell consisted, if we do without scientific terms, as if in its 
		"listening" for the presence of ultrasonic radiation of growing cracks. 
		It was found that the state of the Tsar Bell at the time of diagnosis 
		was satisfactory, and catastrophic destruction does not threaten it in 
		the near future.
For further monitoring of the condition of the 
		cracks in the bell, the Rostovites were offered to make a multi-channel 
		AE diagnostic system with the installation of a separate sensor at the 
		top of each of the large cracks. However, for the permanent installation 
		of receiving AE sensors on the bell, it was necessary to coordinate many 
		different issues. For example, it was necessary to prove that a 
		constantly working system listening to a bell would not be able to 
		listen to anything else “inappropriate” around, etc. The discussion and 
		coordination of these issues dragged on. Soon perestroika came, and 
		everyone was not up to the bell.
Judging by some external signs, 
		a slight deformation of the bell still continues. The “tradition” of 
		pushing metal coins into the cracks of the bell is also alarming. And if 
		earlier small coins had a composition close to the material of the bell, 
		then the current ones are made of completely different metals, which, in 
		the presence of moisture, can cause noticeable electrochemical corrosion 
		of the material inside the cracks. For a reliable assessment of the 
		state of the Tsar Bell in the future, it is necessary to periodically 
		carry out a procedure for diagnosing the possible growth of cracks in 
		its walls using non-destructive testing methods.
The largest bell of the Trinity-Sergius Lavra was also called "Tsar". The bell was made in 1748 (its weight was 64 tons), in 1930 it was destroyed, recast at the Baltic Shipyard in St. Petersburg in November-December 2003 (the weight of the new Lavra Tsar Bell is 72 tons). Today it is the largest functioning bell in Russia.
In the spring of 2016, a team of scientists from the University of California at Berkeley, Stanfod University and the University of Michigan reproduced how the Tsar Bell might sound if it had not been damaged. To do this, scientists created a mathematical model and, using the finite element method and other types of modeling, calculated how an object from a certain material is deformed under a certain influence and what sound accompanies this deformation. First, scientists reproduced the sounds of existing bells and compared them with real ones, and then demonstrated how the Tsar Bell would sound.
In August 1919, the VSYUR command issued its own currency, on banknotes in denominations of 1000 rubles there was an image of the Tsar Bell. Because of this, the money was nicknamed "bells".