• Was a Polish-Italian painter of the late-baroque and Neoclassic periods.
• He was born in Rome, and studied there under Marco Benefial.
• Marcello was recruited to Dresden in Saxony, where he was employed by Elected King Augustus III of Poland.
• After the death of King Augustus, Marcello went to Vienna, and thence to Warsaw.
• In Dresden, he met
Bernardo Bellotto and worked with this Italian painter throughout his life.
• He was recruited by King Stanisław II Augustus in 1766 to become the Director of the newly founded Royal Buildings and Estates.
• In Dresden, he married Federicka Richter, a woman painter known for miniature portraits.
• After Napoleon's rise to power he moved to the Duchy of Warsaw, a client state of the First French Empire and died in 1818.