Westfield Stratford City is a shopping centre in Stratford London owned by the Westfield Group. The centre opened on 13 September 2011. With a total retail floor area of 1883700 square feet (175000 m2) it is one of the largest urban shopping centres in Europe. It is the third-largest shopping centre in the United Kingdom by retail space behind the MetroCentre and the Trafford Centre. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
Building