 Complete the following phrase:  On the night between 26 and 27 May 1993, an explosive device was set off in a Fiat Fiorino packed with explosives near the historic Tower of the Pulci, killing five people and wounding 48 others. The blast caused damage to the library of the academy, resulting in three years of restoration work in order to restore the building to its former state. The incident became known as the 