The Papal Basilica of St. Francis of Assisi is the mother church of the Roman Catholic Order of Friars Minor, commonly known as the Franciscan Order, in Assisi, Italy, the birthplace of St. Francis. The burial place of St. Francis, the basilica is one of the most important places of Christian pilgrimage in Italy. The basilica, which was begun in 1228, comprises two churches known as the Upper Church and the Lower Church. It has been a UNESCO World Heritage Site since 2000. The choir of the upper basilica has 102 wooden stalls with carvings and marquetry by Domenico Indovini (1501). In their centre, on a raised platform, stands the papal cathedra. The most famous decorations are the series of 28 frescoes ascribed to the young Giotto along the lower part of the upper basilica’s nave. Giotto used the Legenda Maior, the biography of St. Francis by St. Bonaventure, to reconstruct the major events in the life of St. Francis. The paintings are so vivid, as if Giotto had been a witness to these events. According to Vasari, they were executed in the period between 1296 and 1304.