Complex sentence: Several major investment banks and commercial banks congregate in this area; other occupants include Moorhouse, a new office building by Foster and Partners at the corner of Moorgate and London Wall.
Split into simpler sentences: Several major investment and commercial banks congregate in this area. There is a mixture of historic and contemporary office buildings, including Moorhouse, which was designed by Foster and Partners, and stands at the corner of Moorgate and London Wall.