The Monsanto Tower (Portuguese: Torre de Monsanto) is a 394feet[1] skyscraper in Oeiras, a town and municipality to the west of Lisbon which is part of the Portuguese capital's urban agglomeration. Finished in 2001, the 17-floor building is the second tallest in Portugal.[1] Lisbon-based architectural firm Sua Kay Architects designed the 21000m2 office building.[1] [2]