Renovation is the process of revitalizing a broken, damaged, or outdated structure.
At the behest of his uncle, Mario Auditore, Ezio renovated various shops and landmarks within Monteriggioni. Renovating shops rewarded Ezio with greater discounts on items, while renovating landmarks allowed him to open treasure chests.
While attempting to liberate the city of Rome from the Borgia, Ezio renovated multiple shops, stables, aqueducts and historical landmarks in the city. Before he could do so, however, he needed to take control of the district by eliminating a Borgia captain and burning their towers.
During his quest for the Masyaf Keys in Constantinople, Ezio aided the local branch of Assassins in taking back the city from the Byzantines. After clearing out a den, Ezio was able to renovate shops and historical landmarks.