Brunca or Brunka or Brunga was a town of ancient Bithynia on the coast of the Propontis, on the road from Nicomedia to Libyssa, 13 M.P. from the former and 12 M.P. of the latter.[1][2]
Its site is tentatively located near Hereke/Yarımca, in Asiatic Turkey.[3][4]
40°46′40″N 29°42′04″E / 40.777757°N 29.701046°E