OpenStructures is an open source modular construction model based on a shared geometrical grid, called the OS grid. It was conceived by designer Thomas Lommée, and first demonstrated at the Z33, a house for contemporary art. According to Lommee, the OpenStructures project explores the possibility of a modular system where "everyone designs for everyone." OpenStructures is developing a database where anyone can share designs which are in turn available for download by the public. Each component design in the OS system will feature previously designed OS parts that were used to create it. In addition, each part will feature component designs that can be made from it.