Catholic

Occupying a small room inside Trier Cathedral, this treasury displays some of Europe's greatest relics - including a nail from the Crucifixion and a sandal of St. Andrew - along with important religious art from a variety of periods.

Roman Catholic Church. 1841-6 by A.W.N. Pugin for the Earl of Shrewsbury.

Santo Stefano is a monastic complex of four Romanesque churches (11-13C) built on the site of a pagan temple to Isis and incorporating earlier churches dating back to the 4th century. There is also a medieval cloister and small museum.

According to tradition, Selby Abbey was the earliest Benedictine monastery in the north of England, founded in 1069. Today it is a Grade-I listed parish church featuring Norman and Decorated Gothic architecture and 14C stained glass.

This Cistercian abbey south of Edinburgh was founded in 1136 and is now in picturesque ruins. It is said to enshrine the heart of Robert the Bruce.

One of the most famous cathedrals in the world, Notre-Dame Cathedral is an Early Gothic beauty famed for its historical importance, fascinating sculpture, and medieval stained glass.

St. Peter's Basilica in Vatican City is the world headquarters of Roman Catholicism and one of the largest churches in the world. Founded by Constantine the Great in 324, it stands over the tomb of Saint Peter the Apostle.

St Nicholas Priory is an 11th-century Benedictine monastery used as a merchant's house after the Dissolution. Only the refectory and west range survive, which are now a museum and event venue.