| Aleksander Olszyński Tenement | |
| Native Name: | Polish: Kamienica Aleksandra Olszyńskiego |
| Image Alt: | Tenement from Gdańska Street |
| Coordinates: | 53.1308°N 18.0089°W |
| Map Dot Label: | Bydgoszcz |
| Building Type: | Tenement |
| Architectural Style: | Neo-Renaissance & Neo-Baroque, with Eclecticism style elements |
| Location: | 58 Gdańska Street, Bydgoszcz,  Poland |
| Client: | Aleksander Olszyński |
| Groundbreaking Date: | 1894 |
| Completion Date: | 1895 |
| Floor Count: | 4 |
| Architect: | Henrich Arndt |
The Aleksander Olszyński Tenement is a habitation house built in the late 19th century from a design by architect Heinrich Arndt in Bydgoszcz,[1] Poland, and located at 58 Gdańska Street.
The building stands on the eastern side of Gdańska Street, between Słowackiego street and Adam Mickiewicz Alley. It is adjacent to the Chapel of the Sisters of the Poor Clares at N.56 and the Carl Meyer tenement at N.60, both Bydgoszcz historical buildings.
The building was erected in 1894-1895 for the carpenter Alexander Olszyński,[2] living at this time at 1 Boiestrasse, on a design by Heinrich Arndt, a Bromberg master mason.[1]
In 1910, the ground floor was refurbished by designer Gustav Habermann to accommodate a business venture. Before the outbreak of World War I, the building housed the offices of the "German Association for People's Health in Bydgoszcz".
In the 1920s, Kochańscy Brothers & Kunzle (Polish: Bracia Kochańscy i Künzl) run a jewelry shop in the premises,[3] manufacturing gold and silver products. During the occupation of Poland, the building housed the main store of the Württemberg metal goods factory (German: WMF-Württemberger MetallwarenFabrik).
One can still notice preserved and rich, Neo-Renaissance and Neo-Baroque stucco decoration of the facade.Many original forms of the eclectic architectural details are also present, in particular the adorned wooden main door with a transom light.