Simplify the following text for a Grade 10 native English-speaking person.
Original: There are statues of PiÅ sudski in many Polish cities ; the highest density of such statuary memorials is found in Warsaw , which has three over the span of little more than a mile joining the Belweder Palace , PiÅ sudski 's residence , with PiÅ sudski Square .
Simplified: When they stopped helping Austria-Hungary and Germany , PiÅ sudski was arrested .