according to the 1945 Potsdam Agreement, the hall was renamed Hala Ludowa ("People's Hall") by the communist authorities. In 1948, a high needle-like metal sculpture called Iglica was set up in front of it. The hall was extensively renovated in 1997 and in 2010. Recently the Polish translation of the original German name, Hala Stulecia, became official. Centennial Hall hosted EuroBasket 1963 and a preliminary round group of the EuroBasket 2009 tournament. Following the renovation in 2009–11, the arena can now hold 10,000 people. In October 2014, the building received a $200,000 renovation grant from the Getty Foundation, as part of the Keeping It Modern grant program that was created a month earlier by the American foundation. Architecture The cupola modeled on the Centennial Hall was made of reinforced concrete, and with an inner diameter of and height of 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 high, made of steel and glass. The Jahrhunderthalle became a key reference for the development of reinforced concrete structures in the 20th century. At the centre of the structure a superior dome with lantern is situated. Looking from the inside, there is a clearly visible pattern of the Iron Cross at the top of the dome; for this reason the centre of the structure was shrouded during the Communist era in Poland. Organs The hall was originally provided with a Sauer pipe organ built by Walcker Orgelbau, which then, with 15,133 pipes and 200 stops, ranked as the world's largest. On 24 September 1913, Karl Straube was the first to play it, performing Max Reger's Introduction, Passacaglia and Fugue, Op. 127, specially composed to celebrate the occasion. Most parts of the organ were transferred to the rebuilt Wrocław Cathedral after World War II. Additional registers: Handregistierung, Freie Kombination 1, Freie Kombination 2, Freie Kombination 3, Freie Kombination I, Freie Kombination II, Freie Kombination III, Freie Kombination IV, Freie Kombination V, Freie Kombination P, Walze (Crescendo) I – III und Pedal, Tutti mit Fernorgel, Tutti ohne Fernorgel, Fortissimo, Forte, Mezzoforte, Piano, Tutti I, Tutti II, Tutti III, Tutti IV, Tutti V, Tutti P, Forte I, Forte II, Forte III, Forte V, Forte P, Mezzoforte I, Mezzoforte II, Mezzoforte III, Mezzoforte IV, Mezzoforte V, Mezzoforte P, Piano I, Piano II, Piano III, Piano