Gedächtniskirche, Protestant memorial church in Speyer, Germany

The Gedächtniskirche is a United Protestant church in Speyer, built of whitish-grey Vosges sandstone in the doctrinal neo-Gothic style. Its 100-metre bell tower, the tallest in the Palatinate, has an open belfry, clock faces and pinnacles. The nave and aisles have pointed-arch windows with tracery, and the steep roof is covered with glazed tiles in diamond patterns.

The Gedächtniskirche was built from 1893 to 1904 to commemorate the Protestation of 1529 at the Diet of Speyer, when Protestant rulers defended their faith. The foundation stone was laid on 24 August 1893, and the church was consecrated on 31 August 1904. Emperor Wilhelm II promised to ensure its completion after funds ran short in 1890.

The name refers to the Protestation of 1529 at the Diet of Speyer, where Lutheran princes rejected a vote on religious allegiance; the term "Protestant" derives from this protest. The rose window links the event to scenes from the Old and New Testaments. The church is a United Protestant building serving both Lutheran and Reformed confessions.

The church stands southwest of the old town, outside the former Landau Gate, in the Wilhelminian suburb; it is a free-standing building like the cathedral. The 100-metre tower with its Memorial Hall on the ground floor marks the entrance side. The nave is 24 metres wide and the central vault 22 metres high, so allow time to walk the length of the 51-metre interior.

The building was deliberately designed as a memorial structure rather than a conventional place of worship, which shapes both its form and interior. This dual function as a prayer space and monument makes it distinct from other churches in the surrounding area.