Yolçatı, formerly Gelevri or Galivri, deriving from its Greek name Kalavrye or Kalabrye (Greek: Καλαβρύη), is a neighbourhood in the municipality and district of Silivri, Istanbul Province, Turkey.

[2] The settlement exists since Late Antiquity, and was until recently known by its Greek name Kalavrye or Kalabrye (Καλαβρύη), also Galavrye/Galabrye (Γαλαβρύη), Kalabria (Καλαβρία), Kalovrye/Kalobrye (Καλοβρύη), and Kalavre (Καλαυρή).

[3] The inhabitants of the town were involved in the Nika riots of 532 against Emperor Justinian I.

[3] The locality is next mentioned in 1078, as the site of the Battle of Kalavrye, where the forces of Emperor Nikephoros III Botaneiates, led by Alexios Komnenos, defeated the army of the rebel general Nikephoros Bryennios the Elder.

[3] The village was home to a Greek community (numbering 212 in 1922) until the Greco-Turkish population exchange.