Valentino, the fashion house behind the wedding dress, posted a photo of Marcia in the gown the day after the ceremony and praised its bespoke nature.
"It makes sense," read the caption. "When marrying @RamazzottiEros you wear a couture dress with your lovesong embroidered on it #newlywed".
Another picture uploaded by the Italian designer showed the couple, who are parents to two-year-old Raffaela Maria, after their ceremony in the Palace's grounds.
"A very proud Eros Ramazzotti stands beside his wife, Marica Pellegrinelli," wrote Valentino. "Married yesterday both bride and groom wore custom made Valentino designed by Creative Directors Maria Grazia Chiuri and Pierpaolo Piccioli. #hautecouturelove ❤️".
Eros, 50, was previously married to Swiss model and actress Michelle Hunziker from 1998 to 2002 and the couple have a seven-year-old daughter called Aurora Sophie.