The Church of St. John of Kronstadt, belonging to the Berlin and German Diocese of the Russian Orthodox Church, is located in Hamburg and is the largest church of the Russian Orthodox Church in Germany.

Originally, the building was constructed in 1906-1907 for the Lutheran community and was called the Church of Divine Mercy. In 2004, it was transferred to the Orthodox community of St. John of Kronstadt.

In the late 19th century, the northern part of the districts of St. Pauli, Karolinenviertel, and Schanzenviertel was actively populated, and the Evangelical Lutheran community of St. Paul's Church decided to build a second church to improve pastoral care. The new church, named Gnadenkirche, was located between the courthouse and the prison.

Design work began in 1904, and architect Fernando Lorenzen developed a design in the neo-Romanesque style with Rhenish-Staufer elements. The first stone was laid on July 8, 1906, and the consecration took place on December 1, 1907. The church had 830 seats.

During World War II, the building suffered significant damage from bombings, and services resumed only in 1947. In 1957, the organ was restored.

In the 1960s, the population of the area significantly decreased, and the church began to be used for non-sacred purposes, earning the name 'art church.'

In 2002, the Gnadenkirche community merged with the St. Pauli community, but due to financial difficulties, the building was sold to the Orthodox community for a symbolic euro.

The church, standing 53 meters tall, is shaped like an equilateral cross and is designed in a neo-Romanesque style with Eastern elements. It is adorned with a massive octagonal tower topped with a tent roof and several chapel-like extensions. The interior space is also octagonal and oriented from north to south.

According to priest Sergey Baburin, the temple, despite the mixture of styles, is very beautiful and meets all the requirements of Orthodox architecture.