Many of these buildings rarely open their doors to the public. Although, the visits are completely free, some require prior reservations. In addition to the free visit, some buildings will also offer a concert or event. The list and description of buildings that can visited are available in English (and Lithuanian) on the Open House Vilnius website.
There is a good mixture of some brand new buildings and historic venues. Among the buildings are the parliament, the PM office, some museums, government buildings, office buildings and a few embassies such as the purpose designed Czech and Estonian embassies. A few theatres will allow also a look behind the scenes.
Given that this year, there are about 60 buildings, it is best to plan your visit. Some of the buildings are outside the city centre, but many are located within a good 15-minute walk from the centre. As each building on the Open House Vilnius website is well described, it is important to note that some can be visited both days, whilst others are open 1 day only.
It is recommended to bring valid official identification as that is required to access some government building, such as the national parliament. All building, opening days and requirements are listed on the Open House Vilnius website: http://www.openhousevilnius.lt/en/
Open House Vilnius is part of a worldwide initiative that started in London in 1992 and is now organised in more than 30 countries. The main aim of the organisation is to engage in a dialogue between buildings and the public. The first Open House in Vilnius took place in 2015.