Piotrków Trybunalski, often simplified to Piotrków, is a city in central Poland with 71,252 inhabitants. It is the capital of Piotrków County and the second-largest city in the Łódź Voivodeship. Founded in the late Middle Ages, Piotrków was once a royal city and holds an important place in Polish history; the first parliament sitting was held here in the 15th century. It then became the seat of a Crown Tribunal, the highest court of the Polish–Lithuanian Commonwealth.