Tower E is on the northern side of the bastion of Su Nuraxi (15th-13th century B.C.).
From the courtyard, through a long curved corridor that runs between the curtain wall of the bastion and the keep, one enters the entrance foyer of the perimeter tower (figs. 2, 3), 3.70/1.00 metres long and 0.75/1.03 metres wide.
To the left of the corridor entrance, there is a semi-circular sentry box, that changed during Phase C (12th-10th centuries B.C.) into a basin to collect rainwater. Tower E that was originally formed by two chambers one above the other, has a base diameter and vault height of 4.40 metres x 8.40 metres. There is a circular well (internal diameter 1.11/2.30 metres, depth 2.15 metres) in the centre of the room, with an internal floor and mouth made from rough stones arranged in rows, dated to Phase C, inside which the bronze handle of a Nuragic bucket used to draw water has been recovered.
The double row of embrasures made in the lower chamber wall is larger than the one in the other towers in the bastion: there are ten embrasures in the lower row and eight in the upper row. When the bastion wall was redone, the embrasures were closed up (fig. 4).
- 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.