Following in the footsteps of the successful Hybrids series, this double issue of a+t introduces a new line of investigation, presenting a collection of 20 new projects that are also accompanied by a compilation of classic hybrid buildings. These structures encourage the interaction of a variety of urban uses while also successfully combining private residential activities within the public realm. In particular, this hybridisation goes beyond mix-use programmes, as it reflects the combination of public and private interests in housing, public space and civic facilities. In so doing, it also provides a suitable response to concerns about land scarcity, high-costs, sustainable development and urban revitalisation. Offices with works featured include: MRVDV, VMX, Steven Holl Architects, OMA, Ito AA – b720 Arquitectos, OMA, Block Architects, Neutelings Riedijk Architects, FAA+XDGA, Gehry Partners and Gigon /Guyer.