 This renovated form of government was constantly embattled.By the end of the 12th century, it had undergone a radical transformation, with the reduction of the number of senators to a single one – "Summus Senator" – being thereafter the title of the head of the civil government of Rome.In modern terms, for example, this is comparable to the reduction of a board of commissioners to a single commissioner, such as the political head of the police department of New York City.