Catholic

Dubbed the “Cathedral of the Rive Gauche,” Saint-Sulpice is one of the largest churches in Paris. It was constructed sporadically between 1646 and 1745 in the Late Baroque style.

This 14th-century church tower atop a conical hill is the only surviving part of the Monastery of St. Michael.

Founded by Cistercian monks in 1132, this is the largest monastic ruin in Britain and part of a World Heritage Site. It has many interesting things to see in a beautiful natural setting.

Housing the tomb of St. Francis and filled with spectacular medieval frescoes by Giotto, this church is Assisi's crowning glory. It is a major place of pilgrimage for St. Francis devotees and art lovers alike.

Walled burial ground containing ruins of Kinloss Abbey.

The Mezquita of Cordoba is a beautiful and fascinating 8th-century mosque known for its forest of columns and striped arcades.

Among the largest medieval parish churches in England. Made a collegiate church in 1908, cathedral in 1918. Much damaged by an air raid, November 1940, leaving body of church unroofed and without arcades.

Built 1093-1133, Durham Cathedral is considered one of the finest examples of Norman architecture in England.