By consequence of the Karabakh War in 2020 and due to Azerbaijanian revisionism concerning the history, culture and cultural monuments of the region, the discussion on Caucasian Albania, which is little known in the West in both academic and public circles, has been reignited. The handbook provides an overview of the current state of research on the Caucasian Albanians in an objective, scientifically sound manner. The contributions are not necessarily intended to reveal new scientific findings but rather to summarise approved knowledge. The volume brings together internationally renowned scholars, researchers and practitioners from various fields of studies reporting on and reviewing the state of research concerning the Caucasian Albanians, their history and archaeology, their language and written monuments, their religion, church history and their art, including their relation to the Udi people of today. The companion is intended to neutrally introduce the readership to the subject of Caucasian Albania from various perspectives.