The cross-domed church of Aghios Nikolaos was founded in 1703 from the local doctor Andreas Likinios. Its architectural elements indicate Western influences. During the second Turkish rule it served as an arsenal. After the war of independence under the rule of Ioannis Kapodistrias (1829) and until the middle 20th-century it housed the primary school of the town. One of its former pupils was the poet Yiannis Ritsos.

In the lower town of Monemvasia lies the Church of Christ Elkomenos, considered the oldest church in the byzantine town. It was built in the 6th or 7th century, during the initial settlement of the town’s first inhabitants. Originally, it was a three-aisled, wooden-roofed basilica. Extensive works were likely carried out in the 14th century. In 1520, during the first Venetian rule, the Catholic archbishop Arsenius donated a substantial sum for the church’s repair. In 1538, the original columns were replaced with pillars to support newly constructed barrel vaults, which replaced the wooden roof. The church was destroyed a lot of times and has undergone multiple restorations since. Its interior is adorned with remarkable 17^th-and 18^th-century artworks, mainly portable icons. The most important relic of the church is the famous large icon of Christ Elkomenos, dating from the 14th century and an outstanding example of late Palaeologian-era painting. The icon, was stolen in 1979 but was eventually recovered, restored, and kept at the Byzantine Museum in Athens. In 2011, it was returned to Monemvasia.