One of the main attraction Aarau is considered a city Church, was built probably in the period from 1471 to 1478 years. However produce in 1934/35 and 1959/1960, archaeological excavations have shown that the Church in the territory of Aarau already existed in the VI century of our era. Documents in the possession of the Church, also confirm these data, but with the caveat that in those years the Church Aarau was not independent, and belonged to district sur.

It is known that a new building was erected on the old site, so we can say that city Church of Aargau is one of the oldest in the region. Modern building represents a three-nave Basilica, towering above the living quarters. In front of it installed so-called Fountain of Justice, erected in 1643 by sculptor Heinz Heinz.

The modest facade, painted in a flat white. The interior, too, has not particularly chic, but looks like it hasn't in poverty, and in some sense even solemnly. This is to some extent due to the narrow and tall stained glass Windows, created by Felix Hoffmann in the twentieth century. Depicted on the stained glass scenes from the old and New Testaments. Besides Windows, located in the Eastern part, made of a darker glass to mute the bright colors blinding sun, while the South play bright colors.

Later, in the period from 1968 to 1970 there were created 8 stained glass Windows depicting the Lord's prayer".

The first organ in the Church appeared in 1700, in 1962 he was replaced by a more modern instrument in register 61.