Stephanuskirche, Lutheran church in Detmerode district, Wolfsburg, Germany.

Stephanuskirche is a church at Detmeroder Markt 6 in Wolfsburg-Detmerode, built from Alvar Aalto's designs. Its broad, flat-roofed block is clad in light Carrara marble panels above a recessed dark base with two entry doors and a band of windows; the main portal sits slightly left of centre. To the east a free-standing bell tower rises on nine white-painted concrete columns, originally planned as twelve, and still without bells.

Finnish architect Alvar Aalto designed this building in 1963, with construction completed in 1968 as one of his major projects in Wolfsburg. The church represents a key example of his approach to combining worship spaces with integrated community facilities.

The parish was founded in 1964; a 1965 request to name it after Dietrich Bonhoeffer was refused by the Hanover church office, and the Bonhoeffer name went to a Westhagen congregation instead. The interior holds 250 individual wooden chairs and can seat 600 in total, under a high ceiling shaped by round wooden sound reflectors. The organ, built in 1970 by VEB Orgelbau Bautzen as Opus 414, has 20 stops on two manuals.

The church stands at Detmeroder Markt 6, on a slight rise at the north edge of the district centre, where two shopping streets end. Approaching from the shopping centre you meet the windowless marble facade; the main portal sits slightly left of centre. The free-standing bell tower is on the eastern side. The building is a protected monument and, as a working parish centre, may be closed during services or community events.

The tower was designed for twelve concrete columns, but only nine were built, and it still has no bells. A west wing with a pastor's flat was never realised either, so the church has remained unfinished since its consecration in 1968. The columns, once left as bare concrete, were later painted white.