As in all of Galicia, religious architecture is very important in Sanxenxo, so we can find churches and chapels throughout the municipality. Some come from Romanesque, such as San Xoán de Dorrón, Santa María de Adina and Santo Estevo de Noalla.

Other more modern religious buldings are:

San Pedro de Bordóns, small church of San Xinés , Santa Eulalia de Nantes y church of San Pedro de Vilalonga.

Also in the municipality there are four chapels: San Tomé in Gondar, O Santo in Nantes parish , Santa Catalina in the town of Portonovo and San Mauro in Arra, attached to Armenteire monastery in the past.