Isleworth Mona Lisa
According to Leonardo's early biographer Giorgio Vasari, Leonardo had started to paint "Mona Lisa" in 1503, but "left it unfinished". However, a fully finished painting of a "certain Florentine lady" surfaced again in 1517, shortly before Leonardo's death and in his private possession. The latter painting almost certainly is the one that now hangs in the Louvre. Based on this contradiction, supporters of the authenticity of the "Isleworth Mona Lisa" claim it is the unfinished "Mona Lisa", made at least partially by Leonardo, and the Louvre "Mona Lisa" a later version of it, made by Leonardo for his own use.
Bobbio
Bobbio is located in the heart of Val Trebbia, a valley described by Ernest Hemingway as "the most beautiful in the world". The town is nestled at the foot of Monte Penice, above sea level, on the left bank of the river Trebbia.
Its history is identified with the Abbey founded in 614 by St. Columbanus an Irish missionary, and as a result it became one of the principal centers of religious culture in medieval Italy, home to a famous library and basilica. The possessions of the abbey in the Lombard and Carolingian eras spanned the north of Italy.
Bobbio is a coveted tourist destination known for its history of art and culture, for nature lovers, and for its ancient monuments. It has from antiquity been a crossroads between different cultures such as the Piacentine, Ligurian, Piedmontese, and Pavian.
The historical center and heart of the city has maintained the characteristics of the medieval village.
One town landmark, the Ponte Vecchio, called "Ponte Gobbo" (Hunchback Bridge), also known as the "Devil's Bridge", is an ancient stone bridge of Roman origin, which crosses the river Trebbia in eleven irregular arches. 
The Shrine of Our Lady of Penice, located on top of Monte Penice, dominates the landscape, and is also popular in winter for its ski resorts.
Historians have speculated that Bobbio was the town in which Leonardo da Vinci completed the Mona Lisa.
Carla Glori in December 2011 has published her book "Enigma Leonardo:decifrazioni e scoperte" where the background of the portrait has been identified as the landscape of Bobbio.