Cassioli was born in Florence, Italy to Amos Cassioli, who himself was a well-known painter and went on to mentor his son. Tito Sarrocchi taught Cassioli techniques in sculpting. In 1885 he exhibited at the Academy of Fine Arts in Siena with a painting inspired by Victor Hugo's Toilers of the Sea.
He worked in the memorial hall of the  which was followed by sculpted decorations for the stock exchange in Odessa, and statues and carvings for Arezzo Cathedral. He also produced several paintings for the Church of the Seven Holy Founders in Florence.
The Olympic medal
In 1923 the  In the top right section of the medal a space was left for the name of the Olympic host and the Games numeral. The reverse features a crowd of people carrying a triumphant athlete. His winning design was first presented at the 1928 Summer Olympics in Amsterdam. The competition saw this design used for 40 years until the 1972 Summer Olympics in Munich became the first Games with a different design for the reverse side of the medal.
Cassioli's design continued to inspire the obverse of the medal for many more years, though recreated each time, with the Olympic host and numeral updated. The trend ended in 2004 due to the negative publicity in reaction to the design of medal for the Greek press for using the Roman Colosseum rather than the Greek Parthenon. Pietranik defended himself by stating that the Australian Olympic Committee had instructed him to use Cassioli's 1928 design as a template. The error had remained for 76 years until a new style depicting the Panathinaiko Stadium was introduced at the 2004 Summer Olympics in Athens.
- Winner Medals, Olympic Games Museum. Accessed 27 July 2011.
- Winner's medal for the 1948 Olympic Games in London, Olympic.org. Accessed 5 August 2011.
- London 2012: Olympic medals timeline, BBC News. Accessed 27 July 2011.
- Olympic Summer Games Medals, Athens Info Guide. Accessed 27 July 2011.
- Greek anger at Olympic medal design, The Telegraph. Accessed 5 August 2011.
- Athens' New Olympic Medal Design Win IOC's Nod, People Daily. Accessed 5 August 2011.
- This article incorporates information from the equivalent article on the Italiano WorldHeritage.