Heemskerk's first church was probably built in the 11th century and was dedicated to St. Laurentius. Of that church nothing remains. The tower dates from the 13th century and has a stone spire. The church itself was destroyed in 1573. In 1628 finally a new church was built, this time for the protestant community. The nave shows traces of older brickwork, indicating that parts of the destroyed catholic church were used. The presence of a transept-arm on the north-side could mean that the new church was based on the old one, only smaller. The ruins of the choir were demolished in the 18th century, the nave was closed by a wall at the back. The church is in 17th-century traditional style that combines simple Gothic and Classical elements.