The small, excellently preserved Is Concias Giants' Grave is located on Monte Nicola Bove near Quartucciu, about 100 metres in front of the chapel "Santu Perdu'e Paradisu" in the east of the metropolitan city of Cagliari on Sardinia (Italy). The buildings called “Tumbas de los zigantes” in Sardu are the largest pre-nuragic cult structures in Sardinia and are among the latest megalithic structures in Europe. The 321 known giant tombs are monuments of the Bronze Age Bonnanaro culture (2,200-1,600 BCE), the precursor culture of the Nuragic culture.
The Is Concias Giants' Grave is a site of the type with a square facade. The complex from the 14th or 13th century BCE is typical for the late phase (e.g. Madau, Muraguada, Sa Domu ’e s’Orcu or Tamuli). The exedra of Is Concias is about 10 metres wide and made of megalithic dry stone masonry. On the right side of the exedra are three round stone-framed “ritual fireplaces”. To the left of the entrance is a small baitylos. The low-lying entrance leads into the intact, eight-meter-long, 1.3-meter-wide chamber that narrows at the top through a cantilever vault and is 1.7-meter-high in the middle. It still seems to be covered with the original mound. It is 11.6 metres long and 4.5 metres wide.