St. Katharina Zürich, Modern concrete church in Zürich-Affoltern, Switzerland

St. Katharina is a modern concrete church in Zürich's Affoltern neighbourhood, marked by clean lines and open spatial arrangements. Natural light enters through carefully planned openings in the walls and ceiling slabs, while an elevated altar area ensures clear views for all visitors.

The first church on the site was built in 1928 to designs by Fritz Metzger, his earliest work, and consecrated on 25 November, the feast of St. Catherine of Alexandria. It became an independent parish in 1933. After a 1967 competition won by Walter Moser, the parish built the present church from 1970 to 1972 using the second-placed scheme by Wilhelm and Eugen O. Fischer; it received the city of Zurich's award for good buildings in 1976.

The parish is named after St. Catherine of Alexandria, whose feast day on 25 November marked the dedication of the first church in 1928. The red porphyry paving of the outdoor area continues seamlessly into the church interior, where it meets red Swedish granite used for the altar area, ambo, baptismal font and the bases of the altar and tabernacle.

The church stands on a tight plot on Wehntalerstrasse, shielded from the busy road; broad stairs lead from the street up to an inner courtyard shared by church, parish centre and rectory. Inside, the floor slopes gently down toward the altar, so rear benches also see the altar area. Daylight comes through roof light shafts, not coloured glass.

The red porphyry paving of the outdoor area continues without a break from the Wehntalerstrasse into the church interior. Inside, the floor slopes gently downward toward the front, so that even the rear benches have a clear view of the altar area.