Commissioned in 1572 by Grand Master Jean de la Cassière as the Conventual Church of St. John, the St. John's Co-Cathedral in Valletta, Malta, is considered to be one of the finest examples of high Baroque architecture in Europe and one of the world's great cathedrals. The cathedral's interior is extremely ornate, with carved stone walls, painted vaulted ceiling and side altars with scenes from the life of John the Baptist. The most impressive is the marble floor which is composed of nearly 400 tombstones of Knights and officers of the Order. Each tombstone is inlaid by a colored, marble slab bearing the crest, coat-of-arms and epitaph of the noble knight.

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