The Eindhoven public space contains many forms of artistic expression (a book published by the Eindhoven tourist board records 550 as of 2001 and more have been added since), with high "concentrations" of them in the parks. The Stadswandelpark for instance, contains over 30 works of modern art. There are also several other works of art on permanent display throughout the city, such as "Flying Pins" (by Claes Oldenburg and Coosje van Bruggen, who considered the location on the southern stretch of the John F. Kennedylaan to be like a bowling alley) and "Swing" (a construct on the Karel de Grotelaan, which morphs into different geometric shapes as you move around it). There are also a number of statues of famous city inhabitants, such as Jan van Hooff (by Auke Hettema, 1992) and Frits Philips (by Kees Verkade) on the Market Square. There is a statue of Anton Philips in front of the central railway station.