The historicist dimension of Peretiatkovich's work is even more pronounced in his designs for St Petersburg churches. He oversaw the construction of the Saviour Church "on Waters" (Спас-на-Водах), inspired by the 12th-century architecture of Vladimir-Suzdal and commemorating Russian sailors who perished during the Russo-Japanese War. The church was demolished by the Leningrad authorities in 1932. His other major project was the Roman Catholic church of Notre-Dame de Lourdes (1908–09), inspired by Romanesque architecture of Northern Europe and designed in collaboration with Leon Benois.