most respects to the one he had executed in Milan two years earlier,
he travelled in Umbria, visiting Orvieto, Pesaro, Rimini, and other
towns, acting as engineer and architect to Cesare Borgia, for whom he
planned a navigable canal between Cesena and Porto Cese-natico.

[Illustration: PLATE VII.-PORTRAIT (PRESUMED) OF LUCREZIA CRIVELLI

In the Louvre. No. 1600 [483]. 2 ft by I ft 5 ins. (0.62 x 0.44)

This picture, although officially attributed to Leonardo, is probably
not by him, and almost certainly does not represent Lucrezia Crivelli.
It was once known as a "Portrait of a Lady" and is still occasionally
miscalled "La Belle Feronniere."]



MONA LISA

Early in 1503 he was back again in Florence, and set to work in
earnest on the "Portrait of Mona Lisa" (Plate I.), now in the Louvre
(No. 1601). Lisa di Anton Maria di Noldo Gherardini was the daughter
of Antonio Gherardini. In 1495 she married Francesco di Bartolommeo de
Zenobi del Giocondo. It is from the surname of her husband that she
derives the name of "La Joconde," by which her portrait is officially
known in the Louvre. Vasari is probably inaccurate in saying that
Leonardo "loitered over it for four years, and finally left it
unfinished." He may have begun it in the spring of 1501 and, probably
owing to having taken service under Cesare Borgia in the following
year, put it on one side, ultimately completing it after working on
the "Battle of Anghiari" in 1504. Vasari's eulogy of this portrait may