Obvodny Canal (Russian: Обводный канал, lit. Bypass Canal) is the longest canal in Saint Petersburg, Russia, which in the 19th century served as the southern limit of the city. It is 8 kilometres (5 mi) long and flows from the Neva River near Alexander Nevsky Lavra to the Yekaterinhofka not far from the sea port. The canal was dug in 1769–80 and 1805–33.