Cathedral buildings, especially those dating from the Medieval period, are frequently the grandest of churches in the diocese (and country). The ancient cathedrals of England, of Northern France, Belgium, Spain, Portugal, Germany and Sicily, the Baroque cathedrals of South America, and many individual cathedrals from Italy and other parts of Europe, are among the largest and finest religious buildings. Many are renowned for their architecture or their decorative features such as sculpture, stained glass and frescos.