Monaco's richest resident is Andrea Casiraghi's wife Tatiana Santo Domingo
While Tatiana Santo Domingo is amember of Monacos royal family, the 33-year-old surely doesnt need the money of herhusband, Grace Kellys grandson, Andrea Casiraghi, to get by. According to Business Insider, the mom-of-two is one ofEuropes wealthiest individuals with a reported net worth of $2.3 billion.