The Thomaskerk (Thomas Church, built 1966, designed by Karel Sijmons) in Amsterdam is a true Brutalist surprise disguised by a modest and rather ordinary yellow brick exterior. Walking past you would not suspect the spectacular grey walls and exposed cast concrete surfaces inside. The baptismal font and pulpit are also cast in concrete. However, warmness is added by the use of wood in a wave shaped ceiling and the projection of light through a triangular roof window.