Museum of the II World War was built in two stages. Stage I started in 2012 in a deep, dry excavation (the so-called white bathtub), the implementation by Soletanche Polska. Work was delayed and cost 95 million PLN.
Stage II - the building and the overground part of the Museum of the Second World War was built by a consortium of Warbud and Hochtief for PLN 249.9 million. All funds for this purpose came from the Ministry of Culture. Due to geological conditions and technological problems, in April 2015, the Council of Ministers decided to postpone the construction completion date and increase the funds to PLN 448.9 million. Construction works were to be completed in summer 2016, but the museum was finally opened in March 2017.
Minerals DC Nowak delivered almost 100,000 tons of marine aggregates of different fractions for both construction stages.
From the partially glazed tower of the new facility, 40.51 m high, you can admire the beautiful panorama of Gdańsk. One of the walls of the tower is inclined at 56 degrees to the ground.
( source: https://pl.wikipedia.org/wiki/Muzeum_II_Wojny_wiatowej_w_Gdasku)