Saint Bavo's Cathedral, Is a cathedral of the Catholic Church in Ghent, Belgium. The 89-meter-tall Gothic building is the seat of the Diocese of Ghent and is named for Saint Bavo of Ghent. It contains the well-known Ghent Altarpiece.The cathedral stands on the site of the former Chapel of St. John the Baptist, which was primarily of wooden construction and was consecrated in 942 by Transmarus, Bishop of Tournai and Noyon. Traces of a later Romanesque structure can be found in the cathedral's crypt.Construction of the Gothic church began around 1274.In the subsequent period from the 14th through 16th centuries, nearly continuous expansion projects in the Gothic style were executed on the structure. A new choir, radiating chapels, expansions of the transepts, a chapter house, nave aisles and a single-tower western section were all added.