But the Italian moggy is still only the THIRD richest animal in the world.
Tommasino's wealthy owner Maria Assunta died and left him the entire family fortune.
She rescued him as a stray and could think of no one better to leave her portfolio of property to after she died last month aged 94 with no living relatives.
It means the cat is the proud owner of homes and villas across Italy as well as stocks and swollen bank accounts.
Her lawyers, Anna Orecchioni and Giacinto Canzona, say she left the fortune to Tommasino in a will she wrote and deposited with them at their office in Rome in 2009.
Mrs Orecchioni explained that under Italian law Tommasino is not entitled to inherit the money directly so it was ultimately entrusted to Maria's nurse, Stefania.
Mrs Orecchioni said: "In the end we decided that Stefania was the most suitable person to administer the money that Maria had left in her will.
"To be honest he doesn't need all that money. He is happy with a saucer of milk and some biscuits."
Stefania said: "I had no idea that she was worth so much."
The world's richest animal is believed to be Gunter, a German shepherd who was left more than ?90million by his wealthy heiress owner Karlotta Liebenstien.
In 1988, British recluse Ben Rea left his ?9million fortune to his cat Blackie.