

At Walfischgasse 13 in Vienna’s first district there was a branch of the “Poldihütte”, the steelworks of Karl Wittgenstein (Ludwig’s father) in Kladno, in what is now the Czech Republic, which was named after his wife Leopoldine (Ludwig’s mother).
Source: Janik, A.S., & Veigl, H. (1998). Wittgenstein in Wien. Ein biographischer Streifzug durch die Stadt und ihre Geschichte. Springer.