A year later, the first Reform church (now the headquarters of the Warsaw Chamber Opera) and the rectory was built and designed by Szymon Bogumił Zug.

On October 30, 1866, the construction began of a new church in the Gothic style, designed by architect Adolf Loewe.

Among the elements that draw attention are the oak pulpit made and designed by Konstanty Wojciechowski (pl).

This resulted in a Youth Association, a Mission Inner Circle and a Ladies Auxiliary and they conducted Sunday school classes.

In 1958, the parish rectory was restored (the original Zug designed church), where its headquarters were, and in 1957 the editors reactivated the "Unity" magazine.

Many historic gravestones are in need of renovation, so money is collected by the Social Committee for the Protection of Monuments at the Evangelical Reformed Cemetery.