The church of Agios Ioannis Eleimon in Lygourio is the oldest church in the area and it is believed to have been built in the late 11th century and the narthex in the middle of the 12th century. Parts of the Asklepius’ sanctuary and of other ancient monuments in the area were used for its construction. The dome of the temple, which is supported by two columns and two pillars, is a characteristic element of its architecture.

Some findings, such as the well and the remains of medieval Byzantine walls that exist around the temple, indicate that it was the cathedral of a monastery in the past.

The entrance to the church is on the west side of the building while it was formerly on the north side. On the north side there is also an inscription possibly by its architect. In its interior, there still survive parts of the hagiographies dating back to the 12th century.