aside for the projected stadium in Cologne were thus re-allocated to Dortmund, and a new stadium became reality. The Westfalenstadion has undergone several renovations throughout the years to increase the size of the stadium, including an expansion of the stadium for the 2006 World Cup. In 2008, the Borusseum, a museum about Borussia Dortmund, opened in the stadium. In 2011, Borussia Dortmund agreed to a partnership with Q-Cells. The company installed 8,768 solar cells on the roof of the Westfalenstadion to generate up to 860,000 kWh per year. Borussia Dortmund has the highest average attendance of any football club worldwide. In 2014, it was estimated that each of the club's home games is attended by around 1,000 British spectators, drawn to the team by its low ticket prices compared to the Premier League. Training ground Borussia Dortmund's training ground and Academy base Hohenbuschei is located in Brackel, a district of Dortmund. Inside the complex, there are physical exercise training for physical fitness and rehabilitation robotics areas, physiotherapy and massage rooms, and remedial and hydrotherapy pools. There are also sauna rooms, steam rooms and weight rooms, classrooms, conference halls, offices for the BVB front office, a restaurant, and a TV studio to interview the BVB professional footballers and coaching staff for BVB total!, the channel owned by the club. On the grounds, there are five grass pitches, two of which have under-soil heating, one artificial grass field, three small grass pitches and a multi-functional sports arena. The site covers a total area of . In addition, the club owns a Footbonaut, a training robot which is effectively a training cage. The training complex and youth performance centre, located in Hohenbuschei, will be expanded in stages until 2021. In addition, the Sports Business Office will be entirely rebuilt from scratch. The planned construction, which will cost up to 20 million euros, will make BVB the best-equipped football club in the country with regards to infrastructure. In the Strobelallee Training Centre, the BVB Evonik Football Academy has an outstanding training venue exclusively at its disposal. Among others, the Bundesliga-team used to prepare for their matches on the club's former training ground. Organisation and finance Borussia Dortmund e.V. is represented by its management board and a board of directors consisting of president Dr. Reinhard Rauball, his proxy and vice-president Gerd Pieper, and treasurer Dr. Reinhold Lunow. Professional football at Dortmund is run by the