The Kronverk is a ground fortification for the Sts. Peter and Paul Fortress

Peter and Paul Fortress

The Peter and Paul Fortress is the original citadel of St. Petersburg, Russia, founded by Peter the Great in 1703 and built to Domenico Trezzini's designs from 1706-1740.-History:...

 in Saint Petersburg

Saint Petersburg

Saint Petersburg is a city and a federal subject of Russia located on the Neva River at the head of the Gulf of Finland on the Baltic Sea...

, Russia

Russia

Russia or , officially known as both Russia and the Russian Federation , is a country in northern Eurasia. It is a federal semi-presidential republic, comprising 83 federal subjects...

. The Kronverk is situated on Petrogradsky Island

Petrogradsky Island

Petrogradsky Island is the third largest island in the Neva River deltain Saint Petersburg, Russia.Along with Zayachy Island, Aptekarsky Island, and Petrovsky Island,it constitutes the Petrogradskaya Side...

, across the Kronverksky Strait

Kronverksky Strait

The Kronverksky Strait is a narrow channel separating Petrogradsky and Zayachy islands in Saint Petersburg, Russia....

from the Peter and Paul Fortress. It was built in 1705-08, with reconstructions in 1752 and 1800.
On 13 July 1826, five participants of the Decembrists' conspiracy were hanged on the eastern rampart of Kronverk (in 1975, an obelisk was installed on the supposed site of execution).