The Calixtino Codex, an extremely valuable 12th-century manuscript stolen last year from the cathedral in the northwestern Spanish city of Santiago de Compostela and recovered earlier this week, will go back on public display, church officials told Efe Thursday.

The codex was found Wednesday in the garage of a building in Milladoiro, where several people were arrested in connection with the theft of the manuscript.

The manuscript will go on display Friday in the Santiago de Compostela Cathedral's chapterhouse.

Police found the codex wrapped in trash bags in the garage of Jose Maria Fernandez Castiñeiras, who worked at the cathedral for many years as an electrician.

Fernandez Castiñeiras, his wife and son were arrested on Tuesday in connection with the robbery, and the son's girlfriend was arrested later.

The son and his girlfriend were released from custody on Thursday.

The codex's authenticity was confirmed by church officials but is still in safekeeping by police.

Fernandez Castiñeiras, worked at the cathedral for 25 years, had keys to the church, sources close to the investigation told Efe on Thursday.

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