With a total floor area of 140,000 m2 (1,506,900 sq ft) it is the largest office building in Germany.
[citation needed] The Squaire is located between two motorways, the Bundesautobahn 3 and the Bundesstraße 43, close to one of the most heavily used Autobahn interchanges in Europe, the Frankfurter Kreuz.
The Squaire is connected to a multistorey car park to the west by a people mover called MiniMetro operating high above the highway driveways.
When Deutsche Bahn announced plans to build a fast rail link between Cologne and Frankfurt (Cologne–Frankfurt high-speed rail line) it planned for a second train station at Frankfurt Airport because it was clear that the existing train station would not be able to handle the predicted traffic.
Due to lack of potential tenants the plans were delayed several years until 2006 when the construction of the building, then called Airrail Center Frankfurt, began with an announced opening day in 2010.
The accounting firm KPMG, two Hilton hotels, and Lufthansa occupy space in The Squaire.