Corner tower B is on the southern side of the bastion of Su Nuraxi (15th-13th century B.C.), in a frontal position to close and protect both the keep and the courtyard (fig. 1).
The tower has only a single cell, that was originally made of two chambers, one on top of the other. Its external diameter is 8 metres, an internal base diameter of 4.70 metres and a residual height of 8.40 metres. The ground floor chamber is accessed through a foyer that is 3.10/3.70 metres long and 1.37/1.81 metres wide (fig. 2).
The lower chamber wall had a double row of embrasures that also act to provide light and air; the upper row originally had a wooden walkway that could be accessed from a mobile staircase. When the bastion wall was redone, between the 12th and the 10th centuries B.C., the embrasures were closed up (fig. 3).
- LILLIU G., Il nuraghe di Barumini e la stratigrafia nuragica, in Studi Sardi, XII-XIII (1952-1954), Sassari 1955.
- LILLIU G., I nuraghi. Torri preistoriche della Sardegna, Verona 1962, pp. 181-191.
LILLIU G., ZUCCA R., Su Nuraxi di Barumini, Sardegna archeologica, Guide e Itinerari, Sassari 1988.
- MURRU G., Barumini. Su Nuraxi e il villaggio nuragico, Fondazione Barumini Sistema Cultura, 2007.
- SANTONI V., Il nuraghe Su Nuraxi di Barumini, Guide e Studi, Quartu Sant’Elena 2001.
- USAI L., Il nuraghe Su Nuraxi, Barumini, in CAMPUS F., LEONELLI V. (a cura di), Simbolo di un simbolo: i modelli di nuraghe, Monteriggioni 2013, pp. 324-329.