During the 2001 and 2002 excavation campaigns, nine of the seventeen rooms arranged around the Palace of Baldu were investigated.

Various glassy fragments were found in the three south-facing rooms of the main building which belong to the group known as "Aldrevandin".

The fragments are characterised by enamel decorations with different patterns such as two red parallel lines separated by a white wavy line and plant motifs (fig. 1); while one bottom is devoid of any decoration (fig. 2).

Fig. 1 - Luogosanto, Palace of Baldu: fragments found in rooms η, θ, ι (from PINNA, MUSIO 2012, pp. 322-323, figs. 14, 16-17).

Fig. 2 - Luogosanto, Palace Baldu: fragment of the bottom with no decoration (from PINNA, MUSIO 2012, p. 324, fig. 18).

This group of artefacts is named after the glass-maker who signed a glass, currently in the British Museum in London (fig. 3), with the Latin inscription "Mastro Aldrevandin made me". This sample is decorated with coats of arms and floral elements made with enamelled decorations, the other glasses which are part of the group, however, have religious subjects, heraldic symbols and animals.

Fig. 3 - London, British Museum: the so called “Aldrevandin” beaker (from http://www.alessandraartale.it/2015/03/venezia-e-lislam-guerre-e-arte.html; HESS, HUSBAND 1997, p. 7, fig. 10; http://flickriver.com/photos/ragnvaeig/3701439504/).

It has been suggested that the "Aldrevandin" glasses should be dated to fourteenth and fifteenth century Venice. This hypothesis derives both from the presence of historical sources referring to the production of Venetian glass during the fourteenth century, and specifically to painted drinking glasses, and from the close link which existed between Venetian craftsmen and eastern ones.

Because of their sophistication, these artefacts can be considered luxury products, which, in Sardinia, have only been documented in the Palace of Baldu and the castle of Monreale (fig. 4).

Fig. 4 - Sardara, Castle of Monreale: graphic representation of the vitreous fragment with the coat of arms of Aragon (from SANTINI 2012, p. 308, Tav. 5).