Last year the German artist Christian Jankowski travelled to Poland to produce Heavy Weight History, which consists of an installation, a 25-minute film and a series of photographs. Jankowski invited a group of burly weightlifters to try and pick up a number of massive public sculptures in the Polish capital of Warsaw, including more than one Communist-era memorial, a statue of Ronald Reagan and the figure of Syrenka the Mermaid, a famous, often vandalised symbol of the city, first erected in 1859. Wearing their national colours, the Polish champion powerlifters and bench-pressers struggle and strain to elevate these hefty bronze and brick monuments, metaphorically attempting to lift the very burden of history on to their shoulders.