The Bartlett Space Syntax Laboratory is the international centre of the theory and methodology known as 'space syntax'. Its team of researchers study the effects of spatial design on aspects of social, organisational and economic performance of buildings and urban areas, uniquely combining the creation of software for spatial analysis and design with observation of function. Its theoretical and methodological innovations intersect with a variety of disciplines, including anthropology, archaeology, geography, computer science, psychology, sociology, mathematical modelling, public health and physics. The group also incorporates the VR Centre for the Built Environment, whose role is to bring the full range of computer graphics, interaction and digital data to the virtual building that currently drives the design-development-operation cycle. Space syntax software is now used by a growing worldwide research and design community, supported by open source software: UCL Depthmap.