The Calixtino Codex, which was stolen last year from the cathedral in Santiago de Compostela, a city in northwestern Spain, was found Wednesday in the town of Milladoiro, sources close to the investigation told Efe.
The valuable 12th-century codex was found in the garage of a building in Milladoiro, where several people were arrested in connection with the theft of the manuscript.
An electrician who formerly worked at the cathedral, his wife and son were arrested on Tuesday by the National Police.
A fourth suspect was arrested on Wednesday, and all of the suspects will be handed over to the courts.
Investigators had suspected for several months that the electrician stole the codex, followed him and searched several of the family's properties.
The searches turned up coins and other items from the Santiago de Compostela Cathedral, as well as 1.2 million euros ($1.5 million) in cash.
The Codex Calixtinus is composed of five volumes with a variety of themes, but its singular objective was to extol the virtues of St. James the Apostle, whose remains were said to have been found in Santiago de Compostela in an urn some eight centuries after his death.
The missing illuminated manuscript is considered the oldest and most complete original copy of the Codex Calixtinus; 200 others are distributed across Europe in the Spanish cities of Barcelona, Madrid and Salamanca, as well as in Lisbon; London; Pistoia, Italy; and the Vatican.
The most well-known and most frequently translated of the five volumes is the last, which served as a guide for the medieval Way of St. James pilgrim and describes the route, its towns and cities, its people and customs, and shrines that should be visited. EFE