Westerkerk (English: Western Church) is a Reformed church within Dutch Protestant church in central Amsterdam in the Netherlands. It is next to Amsterdam's Jordaan district, on the bank of the Prinsengracht canal.

The 'Westerkerk' was built between 1620 and 1631 in Renaissance style, built according to designs by architect Hendrick de Keyser (1565-1621). He is buried in the church he designed earlier: the 'Zuiderkerk'. The building of the Westerkerk was finished and completed by his son Pieter de Keyser (1595-1676) and inaugurated on June 8, 1631. The church has a length of 58 meters and a width of 29 meters. The high nave is flanked by the two lower aisles. The three-aisled basilica has a rectangular plan with two transepts of equal dimensions. As a result, the plan for this church was given the form of two Greek crosses connected with each other. (a patriarchal cross).  More info, click here.