UEFA Signal Iduna Park as seen from the view of the Florianturm
Signal Iduna Park is the name the Westfalenstadion carries from December 2005 until June 2011. It is a football stadium in the German city of Dortmund (7th biggest German city). It is the home ground of the BV Borussia Dortmund football team and hosted several matches of the 2006 FIFA World Cup, including a semi-final. It has a league capacity of 81,264 (standing and seated), and an international capacity of 67,000 (seated only). The stadium was named after the former Prussian province of Westphalia, which is now part of the German state North Rhine-Westphalia. It is Germany's biggest stadium and established the European record in fan attendance in 2004/2005 with a total of almost 1.4 million fans. Famous for the intense atmosphere it breeds, the stadium has been nicknamed "The Opera House of German Football." Stadion Rote Erde is adjacent in the shadow of the ernourmous ground, home of Borussia's reserve side.

History
The stadium was one of the venues for the 2006 FIFA World Cup. However, due to sponsorship contracts, the arena was called FIFA World Cup Stadium Dortmund during the World Cup.
The following games were played at the stadium during the World Cup of 2006:

2006 FIFA World Cup
Situated directly opposite the Stadion Rote Erde, the Westfalenstadion is composed of 4 roofed grandstands, each facing the playing field on the East, South, West and North sides. The Eastern and Western stands (Ost- und Westtribüne) run the entire length of the field, while the breadth is covered by the North and South stands (Nord- und Südtribüne).
Originally the corners between the four grandstands remained empty, the spectators appreciated the extensive roof, which covered over 80% of the stands. The Eastern and Western stands housed the stadium's 17,000 seats, while the 37,000 standing places were housed in the Northern and Southern stands.

Layout
The original capacity of 54,000 was reduced in 1992 due to UEFA regulations. As the standing rows on the entire Northern, the lower Eastern and the lower Western grandstands were converted into seats, the capacity shrank to 42,800. With 26,000 seats (of which 23,000 were covered), the seating in the Westfalenstadion now outnumbered the standing rows.
After Borussia Dortmund won the national championship in 1995, the Westfalenstadion was expanded yet again. In the first private venture stadium expansion in German history, the two main grandstands, the Eastern and the Western blocks, received a second tier. Covered by a new roof-construction, each section housed an additional 6,000 seats. Thus, the stadium's capacity was restored to the original 54,000, of which the majority (38,500) were now covered seats. Following Dortmund's 1997 Champions League victory, success and an ever growing number of enthusiastic fans made it necessary to enlarge the Westfalenstadion yet again. The Southern and Northern grandstands were enlarged this time, boosting the total capacity to 68,800 spectators. The Southern standing ranks ("die Südtribüne", where the home team's supporters gather) became the largest free-standing grandstand of its kind in the whole of Europe, with a staggering capacity of 25,000.
When Germany won the World Cup bid in 2000, it became clear that Dortmund's Westfalenstadion, the "Opera House of German Football", would play a leading role in hosting the tournament. However, as the Westfalenstadion failed to fulfill FIFA requirements for hosting semi-finals, it had to be enlarged a third and last time. Four new stands were built to fill the corners between the existing grandstands, raising the seating capacity for international games from 52,000 to 67,000. Additionally, the new corner elements provide seating and catering to VIP guests, increasing the total number of VIP seats to 5,000. In order to provide the new sections with an unblocked view of the field, the existing interior roof supports were removed and replaced by exterior pylons, which were painted yellow to suit the BVB colors. The Stadium now hosts up to 82,932 fans (standing and seated) for league matches, and 67,000 seated spectators for international games. For these, the characteristic Southern grandstand is re-equipped with seats to conform with FIFA regulations.

Transport

Signal Iduna Park is the largest football stadium in Germany.
The unique "Südtribüne" (Southern Stand), with more than 25,000 enthusiastic standing fans, makes this stadium one of the most fascinating football-stadiums in the world. It can be converted from standing places (for league games) and seats (for international matches) within two days.
Borussia Dortmund has the highest average attendance of any football club in Europe with a record average of 78,808 spectators in the season 2003/2004.
Prior to their semi-final loss against Italy in the 2006 FIFA World Cup, the German national football team had a fourteen-game winning streak at Signal Iduna Park.
In the video game FIFA 07, the stadium is still known as the Westfalenstadion.