It has been thoroughly modernized in 2004. Company Projprzem SA, established in 1948 as an engineering office, has become in 1990 a joint stock company, listed on Warsaw Stock Exchange. Building at N°15  1955  Modernism  The building of the "Computation Centre of Polish Post Office" has been built in the years 1955-1957, and thoroughly modernized between 1994 and 1995. At its birth in 1920, this institution in Bydgoszcz was the "Audit Office of Polish Post", covering a range of activities throughout the country. In 1935, its name has been changed to "Accounting Chamber of Control of Post and Telecommunications" (), and 1951 to "Central Bureau of Posts and Telegraphs Settlements" (). Since Polish Post restructuring in 1991, the building in Bydgoszcz houses an organizational unit of the company.