High Quality Content by WIKIPEDIA articles! The Port of Liverpool Building (formerly Mersey Docks and Harbour Board Offices, more commonly known as the Dock Office), is a Grade II* listed building located in Liverpool, England. It is sited at the Pier Head and along with the neighbouring Liver Building and Cunard Building is one of Liverpool`s "Three Graces", which line the city`s waterfront. It is also part of Liverpool`s UNESCO designated World Heritage Maritime Mercantile City.