Tsaishi cathedral, Orthodox cathedral in Samegrelo-Zemo Svaneti, Georgia

Tsaishi Cathedral is an Orthodox religious structure in Samegrelo-Zemo Svaneti featuring a central dome and intricate stone carvings across its exterior. The interior contains layered religious artwork and frescoes that reflect different periods of church tradition and artistic development.

An episcopal see existed here by the 6th–7th centuries, and the Tzayish eparchy in Lazika appears in a list of bishoprics from 602–610. The present domed church was built between the 13th and 14th centuries, replacing an earlier basilica from the 10th–11th centuries. After the 1614 earthquake, Bishop Malachi restored the church; Bishop Grigol Chikovani later added a bell tower and enclosing wall. The Russian government abolished the see in 1823, after which a monastery with a school operated until 1879.

The cathedral is dedicated to the Dormition of the Mother of God and serves as the seat of the Eparchy of Zugdidi and Tsaishi. Frescoes in the interior include a standing Virgin holding the Christ Child in the altar conch and a crowned queen among the ktitor portraits on a pillar of the south nave. The south gate holds the grave of Archpriest Amiran Shengelia, who led the parish from 1989 until his death.

The complex lies about ten kilometres southwest of Zugdidi, at the foot of the hills bordering the Colchian plain. The oldest building, the Palata, stands outside the wall in the northwest corner, while the two-storey bell tower is built into the southern wall. The site is an active parish, so time a visit outside services.

The monastery transformed into an educational institution that served as a knowledge center for the region across many generations. This scholarly function is often overshadowed by its better-known religious history.