Stemnitsa, during Antiquity known as Ypsos, is a mountain village in the municipality of Gortynia in Arcadia. Built in Mainalo and at a height of 1083 meters, it is characterized as a traditional settlement. The distance from Athens is 220 km and 45 km from Tripoli. Its population according to the 2011 census is 191 inhabitants, while in 2001 it was 412 inhabitants.



The area has been known as Ypsos since antiquity. According to mythology, ancient Ypsos was built by Ypsountas, one of the fifty sons of the king of Arcadia Lycaon. Reference to Ypsounta is also made by Pausanias in "Arkadika". It is unknown exactly when it was renamed Stemnitsa but it is speculated that it took place in the 7th century AD, after the settlement of the areas by Slavs, as Stemnitsa means wooded and shady place in Slavic. It experienced great prosperity during the Byzantine period, when the Stemnitsa bells were known.

In the revolution of '21 he played a leading role. The Alexandropoulos family of protesters and fighters came from Stemnitsa. Konstantinos Alexandropoulos, initiated in the Friendly Society, formed a corps of 175 people from Stemnitsa and on March 25, 1821 went down to the plain of Karytaina to besiege the Turks there. On April 25, he was appointed "general" with the name "Konstantinos Ypsilantis", according to a document where 41 clergymen and laity of the region are sworn in and signed. Fighters were also his brother, his son John who participated in the battles while he was still a teenager, his son Alexander who served on the ship of Kanaris, also his son Vassilios, born in 1809, who followed his father in the battles. John was killed in the battle of Trikorfos in the presence of his brother Vassilis. Christos Alexandropoulos was probably a relative of the previous ones, who was given as a hostage as a guarantee to the Turkalvans who decided to leave Ibrahim in 1827. From Stemnitsa also came the fighter Dimitrios Sfikas who had taken part in the famous Battle of 17 Skoulen 1821), a village in present-day Romania. His book "Memories" about the events of 1821 in Dacia is of great historical importance.

It served as the seat of Theodoros Kolokotronis who called it "Moria's space girl". Due to its role in the national liberation struggle, it was the seat of the first Peloponnesian Senate and the first informal capital of the revolutionary Greek nation for a month. It was proclaimed on May 27, 1821 - the date on which an assembly of the First Peloponnesian Senate took place in I.M. Chrysopigi in Stemnitsa.

Due to the inaccessible soil of the area, people turned to trade and silver and goldsmithing. In Stemnitsa there is also the School of Silver and Goldsmithing of DIEK Stemnitsa.

Stemnitsa was the seat of the Municipality of Trikolon that operated in the period 1835-1912 as well as the modern municipality of Trikolon that operated in the period 1999-2010. In the period 1912-1995 it was a separate community, while in the short period 1995-1998 it was the seat of the Municipality of Stemnitsa which was a continuation of the community. Since 2011 it belongs to the Municipality of Gortynia.