 As well as the main Principal Architects for France and Belgium ( Baker , Blomfield and Lutyens ) , there were Principal Architects appointed for other regions as well . Sir Robert Lorimer was Principal Architect for Italy , Macedonia and Egypt , while Sir John James Burnet was Principal Architect for Palestine and Gallipoli , assisted by Thomas Smith Tait . The Principal Architect for Mesopotamia was Edward Prioleau Warren . 
