Ireland's Book of Kells, which drew 1 million visitors in 2018 alone, has been removed from display through early March for conservation and preservation.
The illuminated ninth-century manuscript, which documents the four Gospels of the life and teachings of Jesus, is one of Ireland's most important cultural and tourism exhibitions.
The medieval manuscript, located in the Old Library of Dublin's Trinity College, has been recognized by Unesco as a Memory of the World.
The conservation work is part of the redevelopment of the Old Library, which also includes structural upgrades and the digitization of its collection.
A full-color replica of the Book of Kells is available to view in Trinity's Long Room library in the interim.