Unlike the majority of Greek islands, Alonissos does not have many churches, since they were mostly located in Old Alonissos and were destroyed after the earthquake in 1965. However, there are a few churches worth visiting:
The Church of Christ, in Old Alonissos, which was built in the 12th century A.D. and was among the very few churches that survived the earthquake. It is made of stone but its walls are white painted. This church houses significant Orthodox icons of the 17th century A.D.
The Church of Agios Georgios is another church that survived the earthquake. Built on the highest spot of Old Alonissos it is a picturesque, traditional, stone-built, white chapel. This church offers visitors a magnificent view, while it also houses two unique Orthodox icons of the mid-17th century.
The Church of Agios Athanasios is the third church that survived the earthquake and it was built during the same period as the Church of Christ. It is a quite spacious, stone-built church, which also has a beautiful paved yard and houses a significant Orthodox religious icon of the 18th century and those of the Church of Agios Demetrios, which was ruined by the earthquake.
The Church of Panagia tou Vounou, which means Virgin Mary of the Mountain, due to the fact that this church is built on a mountain slope. The decorative wall paintings inside this church date back to the 17th century A.D.
The Monastery of Agioi Anargyroi at the western part of the island, close to the beach of Megali Ammos. This is a beautiful byzantine church with magnificent views to the western coast of Alonissos.