Piotrkowska Street, also called Bigel or Pietryna, is the longest street in Poland. It’s 4.2 kilometers long. Historic residential and industrial buildings of the 19th and early 20th century are around it. Initially, Piotrkowska Street was a standard tract leading from Lodz to Piotrków Trybunalski in the south and to Zgierz and Łęczyca in the…