London-based practice Architects of Invention (AI) has submitted a design proposal for 500 residential units in Birmingham’s Digbeth area. The design concept is inspired by The Hanging Gardens of Babylon: an oasis-like residence for Birmingham’s growing, multicultural population. The two dramatic 25-storey staggered towers, hung with gardens at every level, give all occupants and visitors access to private and shared terraces and a spacious rooftop garden. The entire block is made of CLT (Cross Laminated Timber) as an exercise in highly sustainable construction.