Which preposition to use with landsberg

on Occurrences 1%

Reared in the Moravian schools at Niesky and Barby, he studied at Halle; and, between 1794 and 1804, was a preacher in Landsberg on the Warthe, in Berlin (at the Charité Hospital), and in Stolpe, then professor in Halle.

Which preposition to use with  landsberg