Hala Stulecia

It was constructed according to the plans of architect Max Berg in 1911–1913, when the city was part of the German Empire. As an early landmark of reinforced concrete architecture, it was listed as a UNESCO World Heritage Site in 2006.

The building is frequently visited by tourists and the local populace. It lies close to other popular tourist attractions, such as the Wrocław Zoo, the Japanese Garden, and the Pergola with its Multimedia Fountain.

The cupola modeled on the Festhalle Frankfurt was made of reinforced concrete, and with an inner diameter of 69 m (226 ft) and 42 m (138 ft) high it was the largest building of its kind at the time of construction. The symmetrical quatrefoil shape with a large circular central space seats 7,000 persons. The dome itself is 23 m (75 ft) high, made of in steel and glass. The Jahrhunderthalle became a key reference for the development of reinforced concrete structures in the 20th century.

An old photo, not very good, but I like framing. And have good memories from that trip...