Although Pisa is known worldwide for its leaning tower ( the bell tower of the city's cathedral ), the city of over 88, 332 residents ( around 200, 000 with the metropolitan area ) contains more than 20 other historic churches, several palaces and various bridges across the River Arno.

The cathedral contains a tomb in its crypt that it maintains still holds a portion of the relics of the apostle.

Although not so refined as mosaics in Cefalù and the Palazzo dei Normanni, the cathedral interior nevertheless contains the largest cycle of Byzantine mosaics extant in Italy.

Widely considered one of the finest examples of French Gothic architecture and among the most well-known churches ever built, Notre Dame is the cathedral of the Catholic Archdiocese of Paris ; that is, it is the church that contains the cathedra ( official chair ) of the Archbishop of Paris, currently André Vingt-Trois.

The cathedral contains the best preserved of the four surviving copies of the Magna Carta and a large mechanical clock installed in the cathedral in 1386 — the oldest surviving mechanical clock in Britain.

The South West Tower ( Oxford Tower ) contains the cathedral ’ s main ring of bells, hung for change ringing in the English style.

The North West Tower ( Arundel Tower ) contains the cathedral ’ s clock chime.

The cathedral also contains a statue of St. Giuseppe Moscati, a native of the area.

The city contains numerous medieval buildings, including the cathedral Notre-Dame of Laon, dating mostly from the 12th and 13th centuries.

The Romano-Gothic cathedral, where lie the remains of Jörg Jenatsch, was begun by Bishop Tello ( 758-73 ), and has a highly interesting crypt ; it contains some remarkable paintings by Dürer and Holbein.

The church contains Biblical paintings, a colossal statue of Christ seated between the Virgin Mary and St John ( 13th century, originally belonging to the cathedral of Thérouanne and presented by the emperor Charles V ), the cenotaph of Saint Audomare ( Omer ) ( 13th century ) and numerous ex-votos.

The north tower was added in 1678 and the south tower in 1768. The shape of the cathedral is a Latin cross and contains five naves.

The park behind the cathedral is Jardin Gregorio Torres Quintero, which contains mango, tabachin ( Caesalpinia mexicana ) and palm trees along with stands selling handcrafts, novelties and food.

The cathedral famously contains the reputed tomb of Strongbow, a medieval Norman-Welsh peer and warlord who came to Ireland at the request of King Diarmuid MacMorrough and whose arrival marked the beginning of English involvement in Ireland.

Christ Church also contains the largest cathedral crypt ( 63. 4m long ) in Britain or Ireland, constructed in 1172-1173.

Behind the altar area, there is the Chapter House, which contains cathedral offices, meeting rooms and other facilities.

English Gothic architecture flourished from the 12th to the early 16th century, and famous examples include Westminster Abbey, the traditional place of coronation for the British monarch, which also has a long tradition as a venue for royal weddings ); Canterbury Cathedral, one of the oldest and most famous Christian structures in England ; Salisbury Cathedral, which has the tallest church spire in the UK ; and Winchester Cathedral, which contains the longest nave and overall length of any Gothic cathedral in Europe.

The cathedral contains the tombs of saint princes Vsevolod ( died in 1138 ) and Dovmont ( died in 1299 ).

This cathedral contains a series of paintings built into the church's wooden panelling depicting the Martyrologium Romanum.

The cathedral contains a rare relic, the body of Saint John the Merciful from the 7th century.

The cathedral contains the relics of St. Erasmus, transferred from Formia ; the remarkable campanile, in Arab-Norman style, dates from the 12th century.

The cathedral has been much altered, but still contains medieval work of the 13th and 14th centuries, notable a handsome western tower and processional door.

The cathedral contains an octagonal marble canopy with sculptures in relief, with a font below it belonging to the 8th century, but altered later.

Now the cathedral of the Roman Catholic Diocese of Honolulu, it is the oldest Roman Catholic cathedral in continuous use in the United States.

The oldest parts of the cathedral of Helsingør date back to the 13th century and tell us that the fishermen's village, as Helsingør was then, was a town of a certain importance.

A cathedral school ( the Katedralskolan ) for the training of clergy was established in 1085 and is today Scandinavia's oldest school.

It is among the oldest cities in Poland, and was one of the most important centres in the early Polish state, whose first rulers were buried at Poznań's cathedral.

Of the thirty-seven Greek churches, the most important are the city's cathedral, the church dedicated to Our Lady of the Cave ( η Παναγία Σπηλιώτισσα ( hē Panagia Spēliōtissa )); Saint Spyridon church, wherein lies the preserved body of the patron saint of the island ; and finally the suburban church of St Jason and St Sosipater ( Αγιοι Ιάσων και Σωσίπατρος ), reputedly the oldest in the island, and named after the two saints probably the first to preach Christianity to the Corfiots.

The school originated as a medieval cathedral school, and it is often claimed ( e. g. by the historian Arthur Leach in a letter to The Times in 1896, and in the Guinness Book of Records ) to have been founded in AD 597 by St. Augustine, therefore making it the world's oldest extant school.

The oldest Christian structure still surviving in Provence is the baptistery of the cathedral in Fréjus, dating from the 5th century.

The Salisbury cathedral clock dating from about AD 1386 is supposedly the oldest working modern clock in the world.

The oldest bell in the cathedral is Bell Harry, which hangs in a cage atop the central tower to which the bell lends its name.

The cathedral in Płock is one of the five oldest cathedrals in Poland.

The oldest parts of the cathedral consist of the octagon with its surrounding ambulatory in which was the original high altar with the reliquary casket of St. Olav and choir.

The oldest church in the city is St John's, which is outside the city walls and was at one time the cathedral church.

The mixed Romanesque-and Gothic-style cathedral of Notre Dame de Tournai and the belfry, the oldest in Belgium, have been jointly designated by UNESCO as a World Heritage Site.

The oldest Roman Catholic cathedral and the first medical college in the country are located in Bahia's capital, which also has one of the highest percentage of churches of any state capital in Brazil.

The central square has a cathedral with the oldest clock in the Americas.

The church is the oldest cathedral in northern Europe and was known as the " Royal Church of St. Mary at Aachen " during the Middle Ages.

The Gutenberg Museum is one of the oldest museums of printing in the world, located opposite the cathedral in the old part of Mainz, Germany.

This cathedral ( founded 572 ; rebuilt in the 13th century ) is the second oldest in Galicia.

It is the seat of a bishopric, with a 12th century cathedral, and is home to some of the oldest churches and buildings in Great Britain.

The old town centre retains a number of historic buildings in addition to the cathedral, including the 17th-century Leighton Library, the oldest private library in Scotland open to the public ( on selected days in summer ).