Agiou Panteleimonos monastery, Orthodox monastery in Mount Athos, Greece

Agiou Panteleimonos monastery is a walled complex of pale blue and white buildings with green roofs on the southwest side of the Athos peninsula. Its katholikon, dedicated to St Panteleimon, was built between 1812 and 1821. Two white drums with green onion domes and gold crosses rise above the blue church, and a stone clock tower with two round faces stands at the centre.

Monks from Kievan Rus' founded a settlement on this site in the 11th century, and it was recognised as a separate monastery in 1169. Catalan mercenaries burned it in 1307. Around 1770 the Greek brethren moved to a coastal kellion of the Resurrection, where the present monastery was rebuilt in the early 19th century with funds from Skarlatos Kallimachos, ruler of Wallachia; Old Russik then became a skete.

The monastery is home to a Russian monastic community that maintains its own religious practices and traditions within the larger monastic community. Daily services and choral singing structure the rhythm of life here and form a vital part of local Orthodox practice.

The monastery sits on Mount Athos, where entry follows specific regulations and requires special permits. Visitors should plan visits well in advance since access is restricted and controlled.

The monastery's 19th-century bells are said to be the largest in Greece. The library in a separate building in the court holds 1,320 Greek manuscripts, 600 Slavonic ones and 25,000 printed books, among them the Uncial 052 and Minuscule 1093. It also keeps relics such as the head of Saint Panteleimon.