The development of Jagiellońska Street as an important and chic area started in the 1830s, with the construction of grand edifices like the building by Prussian administrative authorities of the Regional Office (Polish: Budynek Urzędu Wojewódzkiego).

In 1840, the axis so far called "road to Fordon" (German: Der Weg von Vordon) was named Wilhelmstrasse in honor of the King Frederick William IV of Prussia.

Registered on Kuyavian-Pomeranian Voivodeship heritage list, Nr.601229 Reg.A/209 (31 March 1931)[7] 1582–1602 & 1618–1645 Gothic-Renaissance-Baroque The oldest building in Gdańska Street, it has been used as a warehouse and a fire station during Prussian times.

In that year a new edifice was built by Rudolf Kern, following a design of architect Heinrich Gross: the client was Otto Pfefferkorn, owner of a successful furniture factory[8] and a tenement in Gdanska street.

In 1940, arcades designed by Jan Kossowski have been added at ground level at the request of the Nazi authorities: the project comprised also the opposite building with the same features.

In the 1960s, the construction was expanded with side-buildings, connected by a pedestrian covered bridge:[15] The building was erected on the plan of an elongated rectangle, with four wings at the corners.

[18] In 1920, the building was purchased by Bydgoszcz's Municipal Savings Bank (Polish: Komunalną Kasę Oszczędności), which performed internal modernization works.

[7] 1883–1899 Neo-Gothic Buildings stand on a plot delimitated by the following streets: Jagiellońska, Stary Port, Pocztowa and Franciszek Ksawery Drucki-Lubecki in Bydgoszcz.

1872[12] Neoclassical architecture The building was erected in 1872 on a design by architect von Müller[19] to house the civic school for boys (German: Bürgerschule).

The edifice has undergone serious architectural changes after World War II and the restorations that followed: loss of facades balconies and eclipse of the gable and roof pilasters.

[22] It houses the following departments of the Kazimierz Wielki University in Bydgoszcz (Polish: Uniwersytet Kazimierza Wielkiego w Bydgoszczy-UKW): 1992 A 4-star hotel, equipped in particular with conference and banquet rooms, a restaurant, a bar, a casino and a hairdressing salon.

Originally the building had a symmetrical facade along a two-storey avant-corps topped with battlements, where was located the main entrance,[24] and three extra barracks for the sick.

In 1990, the edifice became the property of the Regional Treasure Department:[24] at that time, several buildings passed under the ownership of the Collegium Medicum in Bydgoszcz, which located here offices of the rector, two deaneries, college administrators, some classrooms, a cafeteria and an additional dormitory.

Its appearance resembled a fortress, but these stylistic features have been lost during the complex reconstruction carried out in 1947–1948,[24] which also wiped away the avant-corps, changed the size and shape of the windows, added a fourth floor and extended the gable to the whole edifice.

At the time the project was called Social Committee for the Construction Youth Culture, Technology and Sport (Polish: Społeczny Komitet Budowy Młodzieżowego Domu Kultury, Techniki i Sportu).

[29] and lasted 6 years: alongside building companies, young people ad pupils also participated to the project reusing bricks coming from on- site ruined 19th century Prussian warehouse Offices.

[28] In 1977 the facility organized and housed the first international festival Bydgoszcz Musical Impressions (Polish: Bydgoskie Impresje Muzyczne), with teams from the Eastern Bloc, France and Sweden.

[45] Built in 1893–1894,[12] by architect Józef Święcicki Neo-renaissance & Mannerism This residential building was completed for Robert Aron, a merchant and manufacturer who started in 1889 a business in the production and sale of tar roofing materials.

Created by Bartosz Bujanowski, it is based on a legend depicting King Casimir the Great meeting a beautiful huntress called Bydgoszcza.

[65] In 2020, on the occasion of the 25th birthday of the popular cookie "(Wafle) Familijne" (English: Family Wafers) produced by the confectionery factory "Jutrzenka" in Bydgoszcz, a mural was created at the corner with Ogiński streets.

[64] The building displays early modernist style, with some original features such as the rounded wrought iron balconies, the large triangular facade pediment[67] and the overwhelming presence of vertical lines that confers to the edifice a look of a Greek temple.

[69] After its refurbishing, the villa houses since 2017 the following municipal offices: Jaworski replicated the modern streamline-Art Deco style he used on his works in Gdynia.

The front door is adorned with a circular porthole-like window, and the balustrades surrounding the terrace and balconies recall bridge boat railings.

Interiors are a real showcase of the skill sets of Jaworski's company, made of high-quality wood and ceramics: the main hall is paneled up to the ceiling with a colored geometric pattern on the floor and a swinging door with crystal-cut panes leads to the stairs equipped with a solid handrail.

[73] The villa, refurbished in 2014,[74] features superb architectural details: vegetal volutes as cartouches, crying figures on top of pilasters and a corner balcony.

Source:[76] ca 1910 Industrial architecture The place was the piano production workshop of Bruno and Ernst Sommerfeld, from 1915 till the end of WII.

[80] The building was erected by entrepreneurs Louis Wolfen and Meyer Fließ,[50] initially as a small steam mill with a capacity of approximately 1 ton per day.

[52] They carried out a thorough upgrading and extended the building to its limits for the time: equipment comprised, among others, a new steam engine and a narrow-gauge railway to a bridge over the Brda river, where transportation barges were standing.

Many significant structural changes occurred afterwards: in 1961, steam engine was replaced for an electric one, and in the 1970s, offices, workshops, sheds and garages were built on the site of the demolished boiler room .

At the time of its erection, the plot was located out of Bydgoszcz city limits, in the village of "Schröttersdorf", and the street bore the name of "Promenadenstrasse" or "Chausseestrasse".