Open House Vilnius features open architecture weekends in Vilnius. Since 2015, architecturally important buildings open their doors to the general public and tours are led by volunteer guides, architects, or building representatives. The event aims to promote public appreciation and understanding of architecture and design, and to foster a dialogue between architects, urban planners, and the general public.

Since 2015, Open House Vilnius is a member of the Open House Worldwide international network, and since 2023 is a part of Open House Europe, an international cooperation project, co-funded by the European Union, that connects over 15 festivals across the continent.