A statue of the famous Dutch philosopher Baruch Spinoza (1632-1677) at the entrance of the Zwanenburgwal Stopera in Amsterdam, the former "Jewish neighbourhood" where he was born and grew up.
The side of the stage has the quote "The purpose of the state is freedom". Besides the statue is a granite mathematical form, the icosahedron, a sphere with twenty equal triangles. This symbolizes Spinoza's rationalism.
On his coat are sparrows, ringneck and roses, according to the artist Nicolas Dings, the symbol of Amsterdam as a city of migrants. The freed foreign parakeets, thanks to an astonishing assimilation, increasingly be seen in Amsterdam trees, while the native sparrow having problems.
See for more Spinoza here