Alþingishúsið, also known as The Parliament House, is a historic building located in central Reykjavík, Iceland. Designed by Ferdinand Meldahl and built in the late 19th century, it serves as the home of Alþingi, the Icelandic parliament. The building features intricate reliefs representing Iceland's mythical landvættir and has housed various institutions over the years, including the Icelandic National Library and the Icelandic National Gallery. While it still hosts parliamentary activities, most administrative offices and meeting rooms are now located in nearby buildings.