Saints Peter and Paul Cathedral (ru. Петропавловский собор) dedicated to Saints Peter and Paul, built between 1712 and 1733 on Zayachy Island along the Neva River. Peter and Paul Cathedral is located inside the Peter and Paul Fortress (ru. Петропа́вловская кре́пость, Petropavlovskaya Krepost), originally built under Peter the Great and designed by Domenico Trezzini. St. Petersburg, Russia.