Siger of Brabant (
Sigerus,
Sighier,
Sigieri or
Sygerius de Brabantia; c. 1240 – before 10 November 1284) was a 13th-century
philosopher from the southern
Low Countries who was an important proponent of
Averroism. He was considered a radical by the conservative members of the
Roman Catholic Church, but it is suggested that he played as important a role as his contemporary
Thomas Aquinas in the shaping of Western attitudes towards faith and reason.