Nostra Signora di Tergu, Romanesque church in Tergu, Italy

Nostra Signora di Tergu is a Romanesque church built with red trachyte slabs and limestone decorations in Tergu, Sardinia. The structure features a central portal with sculpted capitals displaying acanthus patterns, while the upper level displays five blind arcade loggias decorated with geometric designs.

The church, called Sancta Maria de Therco, was a Benedictine abbey founded under Marianus I de Lacon-Gunale, judge of Torres from 1065 to 1082, according to the Libellus judicum turritanorum. It appears among Cassinese possessions from 1122, and the Pseudocondaghe di Santa Maria di Tergu gives 1117 as the year of consecration, with Lombard and Pisan craftsmen taking part in the building. In 1444 church and monastery passed to the archdiocese of Torres.

The name Sancta Maria de Therco appears in the Libellus judicum turritanorum, a 13th-century document in Logudorese vernacular probably written by a monk. The church is still the parish church of Tergu, and its dedication to Nostra Signora is recalled in the Pseudocondaghe di Santa Maria di Tergu, which records the 1117 consecration.

The building sits at the edge of Tergu on an elevated spot with views of the surrounding landscape. The location is somewhat removed from town, so visitors should wear comfortable shoes and bring water for the walk.

The two outermost colonnettes of the upper loggia have a zigzag profile, unlike the smooth shafts beside them. The façade also lacks its upper section, which collapsed over the centuries, so the five-arcade blind loggia now forms the top of the front.