The architect of the limestone house of God, the oldest Baptist Church in Tallinn, located in the district of Kalamaja, is Konstantin Wilcken. This neo-Gothic limestone building was completed in 1902. Its pointed arch windows are clearly more church-like than those of the surrounding low-rise buildings. The church has had an important role in spreading baptism in Estonia. The oldest Baptist congregation in Estonia, the Kalju Baptist Church, was established on 7 May 1884, which also shows how long baptism has been present in Estonia.