In a letter sent out this week, Cullinan was described as 'one of the most important humanists of our period'.
Wickham van Eyck partner Julyan Wickham has contacted architectural luminaries including Ron Arad, Zaha Hadid and Rick Mather in an attempt to award Cullinan the coveted prize.
Wickham said: 'Cullinan has contributed much to architectural polemic from the 1950s to the present day, and continues to make the most outstanding range of buildings, backed with clear philosophical and pragmatic reasoning from a depth of thinking that is quite rare.
'The enormous scope of his work includes urbanism and masterplanning of whole parts of towns and cities. He has planned three universities and has constructed two of them,' he added.