Griffin's tower, Brick chimney in Vasileostrovsky District, Russia.

The Griffin's Tower is the surviving brick chimney of the boiler house of Wilhelm Poehl's pharmacy at 7th Line, house 18, on Vasilyevsky Island. About 11 metres tall and 2 metres in diameter, it has a darker top with recessed vertical panels and two rusty metal bands. Its red-brick surface is covered with rows of white painted numbers, larger near the base.

The chimney belonged to the pharmacy of Wilhelm Poehl (1820–1903), who acquired the site at 7th Line, No. 18, in 1858. It was likely built during his rebuilding of the pharmacy in the second half of the 19th century, serving as a ventilation flue for the chemical laboratory. The chemist Dmitri Mendeleev was a frequent guest. The tower was restored in 2009.

The chimney is the surviving flue of the laboratory where Wilhelm Poehl, owner of the pharmacy at 7th Line 18 from 1858, prepared medicines; the chemist Dmitri Mendeleev was a frequent guest. Visitors still come into the courtyard believing the tower grants wishes, and unknown hands keep repainting it with numbers.

The tower is reachable by public transportation in the Vasileostrovsky District. It is a narrow structure that can be easy to miss, so knowing its exact location beforehand helps with spotting it among surrounding buildings.

On 1 May 1994 artist Alexei Kostroma placed a giant egg in a cardboard nest on top of the chimney and numbered every brick. The egg was repeatedly thrown down and returned, and is now lost; unknown people keep painting new numbers on the brickwork.