As a painter from Livorno, he belonged to the group of the Postmacchiaioli, together with Mario Puccini, Oscar Ghiglia, Plinio Nomellini, Ulvi Liegi, Giovanni Bartolena, and others, and as a French engraver, he was close to Francis Jourdain, Manuel Robbe, Richard Ranft, Eugène Delâtre, Théophile Steinlen.
After his military service in Milan between 1888 and 1891, Tommasi and his brother Angiolo frequented the cultural circle that gravitated around Giacomo Puccini at Torre del Lago, and it was here that he came into contact with several exponents of the Tuscan artistic avant-garde, including Galileo Chini and Oscar Ghiglia.
Oscar Wilde | Oscar | Oscar Peterson | Oscar Hammerstein II | Oscar de la Renta | Oscar De La Hoya | Oscar Pistorius | Oscar II of Sweden | Oscar the Grouch | Oscar Robertson | Oscar Shumsky | Oscar Mayer | Oscar Levant | Oscar Brashear | Oscar Niemeyer | Oscar Lopez | Oscar Isaac | Oscar Goodman | Oscar D'León | Óscar Pereiro | Oscar Marzaroli | Oscar Ichazo | Oscar Harrison | Oscar Hammerstein I | Oscar W. Greenberg | Oscar Sonneck | Óscar Romero | Oscar Kightley | Oscar I of Sweden | Oscar Brand |
From 1997 to 2000, Mr. Jang continued his studies with the world-renowned guitarist Oscar Ghiglia in Konzertklasse at Musikhochschule in Basel, Switzerland, obtaining the Solisten Diplom.