Trondheim was a city located on the north-east coast of Norway. (TV: The Lie of the Land [+]Toby Whithouse, Doctor Who series 10 (BBC One, 2017).) It was across the Atlantic Ocean from Iceland. (PROSE: Dark Horizons [+]Error: Code 2 - no data stored in variables, cache or SMW.)
In the 12th century, it was ruled by Duke Wolvern, who had united the warring tribes, brought peace to the region and established trading with their neighbours. A Viking longship arrived at Trondheim and picked up Princess Freydis for transport to Iceland. (PROSE: Dark Horizons [+]Error: Code 2 - no data stored in variables, cache or SMW.)
Although only partially written, "Trondhe" was one of the many locations that could be seen on the map that Nardole showed Bill. (TV: The Lie of the Land [+]Toby Whithouse, Doctor Who series 10 (BBC One, 2017).)