The group has also revealed that creating a Scottish Guggenheim or securing a major national gallery or museum is one of its main aspirations.

ACSEF is spear-heading the project that aims to create a more attractive city centre by raising Union Terrace Gardens and covering over the unsightly Denburn dual carriageway and adjacent railway line.

The project, currently a concept out for public consultation, is a major economic regeneration proposal that would radically transform the city centre.

Dave Blackwood of ACSEF said: “In our recent discussions as part of the consultation it has become clear that people want to see internationally acclaimed architects being invited to come up with iconic, landmark designs for the City Square project. They believe this project is of such significance that it would merit the launch of an international design competition.”