Breslau

From Tardis Wiki, the free Doctor Who reference
Breslau

Breslau was a city in Germany in the early 20th century. Hannah Tannenbaum lived there with her children Josef and Edi. (PROSE: Toy Soldiers)

Behind the scenes

While only mentioned as "Breslau" in a Doctor Who story, after World War II the city became part of Poland under the current name Wrocław.