Scientists say they are close to finding the remains the woman who modelled Leonardo da Vinci's masterpiece the Mona Lisa. Researchers have opened a centuries-old tomb the Italian city Florence. They believe they will find the skeleton da Vinci's muse Lisa Gioconda, the wife a 16th-century silk merchant. Silvano Vinceti, head Italy's National Committee the Promotion of Historic and Cultural Heritage, plans to test the DNA of the bones the church to determine whether or not Ms Gioconda is the woman behind that famous, enigmatic smile. Mr Vinceti will then use a computer graphics program to generate a face the skull and compare it to the painting. Leonardo da Vinci's painting has been a constant source fascination art experts and ordinary folk alike. Vinceti said: " centuries, historians the world have been coming with various theories who this enigmatic, mysterious woman could have been." He asks: "Was Gioconda the model the Mona Lisa? Or was it some other model, as some people say? Or is it just a construction the painter's fantasy?" Antonio Moretti, a geologist from L'Aquila University told the euronews.com website: "We were very lucky I'd say, because not only is there a good amount bone remains, but they are also disposed of in order at the bottom of the crypt, a plate indicating they belong to the Gioconda family."