The Biblioteca Joanina, sometimes known in English as the Joanine Library, is a Baroque library in Coimbra, Portugal, located at the heart of the University of Coimbra. The Biblioteca Joanina is regularly considered one of the most beautiful libraries in the world.

Coimbra is a city and a municipality in Portugal. The population of the municipality at the 2021 census was 140,796, in an area of 319.40 square kilometres (123.3 sq mi). The fourth-largest agglomerated urban area in Portugal after Lisbon, Porto, and Braga, it is the largest city of the district of Coimbra and the Centro Region. About 460,000 people live in the Região de Coimbra, comprising 19 municipalities and extending into an area of 4,336 square kilometres (1,674 sq mi).