Question: Night of Champions in 2009 was held at what multi-purpose indoor arena in Philadelphia?
Context: The Wells Fargo Center is a multi-purpose indoor arena located in Philadelphia, Pennsylvania.  It is the home arena of the Philadelphia 76ers of the National Basketball Association (NBA), the Philadelphia Flyers of the National Hockey League (NHL), and the Philadelphia Soul of the Arena Football League (AFL).  The arena lies at the southwest corner of the South Philadelphia Sports Complex, which includes Lincoln Financial Field, Citizens Bank Park, and Xfinity Live! . Movistar Arena is a 15,000-seat multi-purpose indoor arena in Santiago, Chile.  It is located inside O'Higgins Park, in downtown Santiago.  Its main structure was built in 1956, but it remained unfinished until 1999 when the roof was completed.  Buyer Peter Hiller opened it on April 15, 2006 as Arena Santiago with a seat-capacity of 12,000.  Telefónica's cell phone division Movistar bought the stadium's naming rights, changing its name on October 6, 2008, while also expanding its capacity by 5,000 seats.  It is one of the largest multi-purpose arenas in South America, with a total surface is 44,000 m².  An additional 3,000 seats can be placed over the court during concerts, boosting the total capacity to 15,000 seats. The Forum is a multi-purpose indoor arena in Inglewood, California, adjacent to Los Angeles.  Located between West Manchester Boulevard, across Pincay Drive and Kareem Court, it is north of the under-construction Los Angeles Stadium at Hollywood Park and the new Hollywood Park Casino.  It is about three miles east of Los Angeles International Airport.  Opening on December 30, 1967, the Forum was an unusual and groundbreaking structure.  Architect Charles Luckman's vision was brought to life by engineers Carl Johnson and Svend Nielsen, who were able to engineer the structure so that it had no major support pillars.  This had previously been unheard of in an indoor arena the size of the Forum. Night of Champions (2009) was a professional wrestling pay-per-view (PPV) event produced by World Wrestling Entertainment (WWE), which took place on July 26, 2009, at the Wachovia Center in Philadelphia, Pennsylvania.  It was the second annual event to be promoted solely under the Night of Champions name and the ninth annual event under the Vengeance/Night of Champions chronology.  Similar to the previous two events, the concept of the show was that every championship in the company would be defended.  It featured talent from the Raw, SmackDown, and ECW brands.  Eight matches were contested on the card. Žalgirio Arena is a multi-purpose indoor arena in the New Town of Kaunas, Lithuania.  The arena is located on an island of the Nemunas River.  It is the largest indoor arena in the Baltics.  The arena's maximum possible seating capacity for basketball games is 15,552, and 20,000 spectators for concerts (when the stage is in the middle, and 17,000 when stage is in the side of the arena).  The Žalgiris Arena replaced the Kaunas Sports Hall as a major venue in the city. The Stožice Arena (Slovene: "Arena Stožice" ) is a multi-purpose indoor arena located in Ljubljana, Slovenia.  It was designed by Slovenian Sadar Vuga d.o.o. architects and is the biggest indoor arena in the country.  It lies in the Bežigrad district, north of the city centre.  The arena is part of the Stožice Sports Park sports complex. Heraklion Indoor Sports Arena, or simply, Heraklion Arena, is a multi-purpose indoor arena that is located in the city of Heraklion, on the island of Crete, in Greece.  It is located in a district called Dyo Aorakia (English: Two Aorakia).  The arena can be used to host gymnastics, handball, volleyball, basketball, boxing, wrestling, fencing, badminton, table tennis, Judo, MMA, and weightlifting, with its primary use being to host basketball games. Manglerudhallen is the name of two arenas, an indoor ice hockey arena and a multi-purpose indoor arena, located in Manglerud, Oslo, Norway.  The capacity of the ice hockey arena is 2,000 and it was opened in 1979.  It is the home arena of the Manglerud Star ice hockey team. Saitama Super Arena (さいたまスーパーアリーナ , Saitama Sūpā Arīna ) is a multi-purpose indoor stadium located in Chūō-ku, Saitama City, Saitama, Japan.  Its spectator capacity is 36,500 at maximum settings, making it the second largest indoor arena in the world.  This main arena capacity is between 19,000 and 22,500 when events such as basketball, volleyball, tennis, ice hockey, gymnastics, boxing, mixed martial arts, and professional wrestling take place there.  It is also the only Japanese arena equipped especially for American football.  The arena features a gigantic moveable section of seating which can reduce capacity for smaller events and create a more intimate setting. The Buyant Ukhaa Sport Palace (Mongolian: Буянт Ухаа Спорт Ордон ) is a 274,000 square meter multi-purpose indoor arena in the Mongolian capital of Ulaanbaatar, adjacent to the Chinggis Khaan International Airport.  The 5,045-seat arena was built using a grant from the People's Republic of China.  The total cost of the arena was 160mil ¥ (20,526,636.18USD) in 2009.  The Shanghai Construction Group completed construction in June 2011.  The arena can host events in basketball, volleyball, badminton, wrestling, and judo, among others.  A dedication ceremony was held in December 2010 with Chinese and Mongolian officials.
Answer: Wells Fargo Center