A metropolitan bishop of London attended the Council of Arles in 314, which indicates that there must have been a Christian community in Londinium by this date, and it has been suggested that a large aisled building excavated in 1993 near Tower Hill can be compared with the 4th-century Cathedral of St Tecla in Milan. However, there is no archaeological evidence to suggest that any of the mediaeval churches in the City of London had a Roman foundation. A grant from William I in 1067 to Westminster Abbey, which refers to the stone church of St Magnus near the bridge ("lapidee ecclesie Sancti Magni medietatem prope pontem"), is generally accepted to be a 12th-century forgery, and it is possible that a charter of confirmation in 1108–16 might also be a later fabrication. Nonetheless, these manuscripts may preserve valid evidence of a date of foundation in the 11th century.