Les Monts Grantez is a fine passage chamber consisting of a passage of large, upright granite blocks and dry stone walling leading into an oval chamber. On the north side is a small side chamber. The passage and side chamber retain their capstones. It has been dated to the Neolithic Age (4000 - 3250 BC)
Discovered in 1839 it was excavated in 1912 by the Société Jersiaise. The main chamber was found to contain the skeletons of six adults and one child, all lying on their sides in a crouched position with quantities of limpet shells, bones and teeth of cow, horse, sheep, pig and deer and colourful sea pebbles. A further skeleton was found in a seated position, propped up by stones in the entrance passage and the scattered remains of a ninth individual in the side chamber. Three round bottomed bowls, broken vase supports, a clay spindle whorl, stone rubbers, hammers, a fine flint pick and a steatite bead were also found.References:
Tyniec Benedictine abbey was founded by King Casimir the Restorer probably around 1044. Casimir decided to rebuild the newly established Kingdom of Poland, after a Pagan rebellion and a disastrous Czech raid of Duke Bretislaus I (1039). The Benedictines, invited to Tyniec by the King, were tasked with restoring order as well as cementing the position of the State and the Church. First Tyniec Abbot was Aaron, who became the Bishop of Kraków. Since there is no conclusive evidence to support the foundation date as 1040, some historians claim that the abbey was founded by Casimir the Restorer’ son, King Boleslaw II the Generous.
In the second half of the 11th century, a complex of Romanesque buildings was completed, consisting of a basilica and the abbey. In the 14th century, it was destroyed in Tatar and Czech raids, and in the 15th century it was rebuilt in Gothic style. Further remodelings took place in the 17th and 18th centuries, first in Baroque, then in Rococo style. The abbey was partly destroyed in the Swedish invasion of Poland, and soon afterwards was rebuilt, with a new library. Further destruction took place during the Bar Confederation, when Polish rebels turned the abbey into their fortress.
In 1816, Austrian authorities liquidated the abbey, and in 1821-1826, it was the seat of the Bishop of Tyniec, Grzegorz Tomasz Ziegler. The monks, however, did not return to the abbey until 1939, and in 1947, remodelling of the neglected complex was initiated. In 1968, the Church of St. Peter and Paul was once again named the seat of the abbot. The church itself consists of a Gothic presbytery and a Baroque main nave. Several altars were created by an 18th-century Italian sculptor Francesco Placidi. The church also has a late Baroque pulpit by Franciszek Jozef Mangoldt.