Russian Chapel, Bad Homburg, Eastern Orthodox church in Bad Homburg, Germany.

The Russian Chapel (Allerheiligen-Kirche) is a red-brick Orthodox church on the Kaiser-Friedrich-Promenade in the southern part of Bad Homburg's Kurpark, built 1896–1899 to plans by Leonti Benois and supervised by Louis Jacobi. It follows 16th-century Russian church forms: an octagonal drum carries a gilded onion dome and cross, the facades have a gilded frieze and tiles with the Russian double eagle, and the entrance porch bears a mosaic of the Saviour Not Made by Hands. The interior holds a single-tier oak iconostasis brought from Saint Petersburg, with six icons painted in oil on galvanised sheet, and a stained-glass window of the Risen Christ at the high place.

The chapel was built from 1896 to 1899 to plans by the St Petersburg architect Leonti Benois, grandfather of Peter Ustinov, with the local building officer Louis Jacobi directing the work. The foundation stone was laid on 16 October 1896 in the presence of Tsar Nicholas II and Tsarina Alexandra; the consecration followed on 22 September 1899 without them. It replaced a graduation house on the site, later moved to Bad Nauheim.

The church is dedicated to All Saints, consecrated in 1899 "in memory of the sacred coronation" of Nicholas II and Alexandra. Services are held in German and Church Slavonic; the parish belongs to the Russian Orthodox Church Outside Russia and is attached to the St Nicholas parish in Frankfurt-Hausen. The oak iconostasis was brought from Saint Petersburg, and its six icons are painted in oil on galvanised sheet metal.

The chapel stands in the southern part of the Bad Homburg Kurpark, on the Kaiser-Friedrich-Promenade, about ten minutes on foot from the railway station. Services are held in German and Church Slavonic; since regular worship resumed in 1981 they have taken place roughly once or twice a month, so check the parish's current times before travelling. The building seats 60 people.

The glazed tiles with the Russian double eagle and the floor tiles were made by Villeroy & Boch in Mettlach. The oak single-tier iconostasis was brought from Saint Petersburg, and its six icons are painted in oil on galvanized sheet metal. A stained-glass window at the high place shows the Risen Christ.