An Etymological Dictionary of the German Language/Platz
Platz (1.), m., ‘place, row, seat, situation,’ from MidHG. platz, m., ‘open space, place’; formed, like Du. plaats, from the Rom. cognates, Ital. piazza, Fr. and E. place, which are derived from Lat. platē̆a (Gr. πλατεῖα), ‘street.’ The word seems to have been borrowed towards the end of the 13th cent.
Platz (2.), m., ‘pancake, fritter’; MidHG. only in MidG. platzbęcke, ‘pastry cook’; allied to platt, or from Pol. placek, ‘flat cake’?. The word is also current in UpG.