 Complete the following phrase:  The tower was built in 1307, during the Pisan domination of the city, by the Sardinian architect Giovanni Capula, who had also designed the Torre di San Pancrazio two years earlier, as well as the Torre dellAquila, partly destroyed in the 18th century and now incorporated in Palazzo Boyl. The tower was part of the citys fortifications in view of the imminent 