Pałac and other 65,000 icons from Icons8 icon pack follow the visual guidelines of the operating systems: Windows, iOS, Android KitKat, and Material. PNG format is free up to 100x100 px. Icons are availble for download in PNG and vector (SVG, PDF, EPS, and more).
The icon is depicting a castle or palace of some kind. The palace is symmetrical with an archway in the middle and five turrets with a prominent tower in the middle. There are two windows on the palace.