Museum of Mother See of Holy Etchmiadzin, Religious museum at Mother See complex in Vagharshapat, Armenia.

The Museum of Mother See of Holy Etchmiadzin is a building within the Mother See complex that houses religious artworks, historical manuscripts, and liturgical objects from different periods. The display includes illuminated texts, ecclesiastical vestments, reliquaries, and metalwork that document Armenian religious craftsmanship and faith.

The museum was founded in 1869 to preserve artifacts from various Armenian kingdoms and periods that document the long history of Christianity in Armenia. The collection grew from the earliest times of Christian faith in the region and reflects cultural continuity across centuries.

The museum keeps reliquaries made by craftsmen to hold relics; some boxes were finished before it was decided which relic they would contain. Many pieces came from Armenian dioceses, communities and families abroad, so the displays also trace the Armenian diaspora. Since 2013 the museum has joined the European Night of Museums.

The museum sits within the Mother See complex and is easily accessed on foot when visiting the main cathedral. Visitors should allow enough time to explore the different exhibition areas, as the collections are spread across multiple rooms and sections.

Among the reliquaries is a silver casket holding the Holy Lance said to have pierced Christ, and a casket made in 1698 for a relic of Noah's Ark. The oldest processional cross in the collection, linked to King Ashot II Yerkat, holds a fragment of the True Cross.