Koffler resided in Vienna in 1914–1916 and 1920–1924. During the ten semesters of his studies, he was successively registered at five addresses. In the first year (as a student at the Faculty of Law) he lived at 7 Hamburgerstrasse (fifth district, 2.5 km from the main university building).
In the autumn of 1915, he moved to 16 Porzellangasse, apt. 47 (1 km from his place of studies), where he resided till the end of the 1915/1916 academic year (from the summer semester – already as a student at the Faculty of Philosophy). That very large and modern tenement house, completed in 1914, comprised numerous flats to rent. Sigmund Freud lived and worked in a nearby house at 19 Berggasse (in 1891–1938).
in 1920/21 Koffler settled at 18 Große Sperlgasse, apt. 12, two kilometres from the university in the vast second district, which in the early twentieth century had the greatest number of inhabitants of the Jewish faith. In the autumn of 1921, he returned to the ninth district, where he stayed at 45 Rossauer Lände Straße (a more prestigious district but a similar distance from his school).
For the last three semesters (i.e. between the summer semesters of 1921/1922 and 1922/1923) he lived on the Donaukanal (second district again) at 67 Obere Donaustraße (again about two kilometres from the university).
This was a rather small four-storeyed tenement. Arnold Schönberg had been born at no. 5 in the same street (in 1874), but he had moved to Mödling, then on the outskirts of the city, after 1918. The nearby orthodox Schiffschul synagogue (operating till 1938) was one of Vienna’s largest ones, while the so-called Polish orthodox synagogue (Polnische Schul) was located from 1893 at 29 Leopoldgasse. However, we do not know whether Koffler attended either of these. In the summer of 1924, he eventually left Vienna and settled in Lwów, Poland as a teacher at the PTM (Polish Music Society’s) Conservatoire in Lwów.
