European Roma Mapping (EU-ROMA) was a Europe-wide 3 year research project on Roma dwelling and housing. It culminated in the book Mapping the Invisible, published by Black Dog.

David worked on the UK research for the project with Project 35, in collaboration with artist Lucy Orta and the London College of Fashion. The project led to conferences and exhibitions across Europe, including at the RIBA and Conway Hall (London), Iowa School of Architecture (Rome) and the University of Thessaly (Volos). The 'Roma Preview Pavilion' was shown at the 11th Venice Architecture Biennale in 2008.

Read about the project in Domus June 2010.