sentences:  The etymology of the German name of the town developed later and derives from the river "Brahe" (Brda in Polish), on whose banks the city is located, and "berg", elevation, mount(ain), combined to 'Brahenberg', with 'a' pronounced in East Pomeranian Low German rather like 'å', later contracted to "Bromberg", dropping the weak 'h', with the 'n' assimilated as 'm' to the following labial sound 'b'.During the early Slavic times a fishing settlement called "Bydgozcya" ("Bydgostia" in Latin), became a stronghold on the Vistula trade routes.The gród of Bydgoszcz was built between 1037 and 1053 during the reign of Casimir I the Restorer.