He was commissioned by the city's Antiquities and Fine Arts Office to replace the iron nasone that they felt was displeasing to the eye.
The two large stacks of two books each adjacent to the deer symbolize the Sapienza University of Rome.
The bookmarks on the bottom books formerly displayed fasces, as the fountains were designed during Fascist Italy, but they were chiseled away after the republic was formed.
Another restoration occurred in 2018 after Dutch hooligans damaged the Fontana della Barcaccia after a football game in 2015.
The Dutch association Wij Zijn Romeinen wanted to finance another restoration in addition to the Barcaccia fountain to show their love for Rome.