Shortly, Leonardo would be called back to Milan at the
behest of the French government. While still in Florence, however,
he probably made his second attempt to build a flying machine and
operate it. (His first attempt was probably made some time in
the late 1490s, in Milan.) He designed bird-like gliders and even
some machines reminiscent of modern-day helicopters. He based
all of his studies on flight and aerodynamics on observations of
birds, deftly sketching the creatures' wing movements.
Commentary
This period marked some of Leonardo's most productive
years. Although the Battle of Anghiari would eventually
deteriorate, it enjoyed great acclaim during its short existence.
Michelangelo was working on what would be the hall's second mural,
and although neither would reach completion, artists from all over
Italy flocked to observe and compare the paintings while the great
masters worked. Had the paintings survived, they would in many
ways have defined the style of their times.
Leonardo had also gained immense respect as an engineer
by this time: in the midst of his work on the artistic Battle
of Anghiari, in 1504, he was called away by the Florentine
government to oversee actual fortifications at Piombino. When
Leonardo first left Florence for Milan, he seems to have been in
search of a city where he could be useful as both an engineer and
an artist. Ironically, it was only after his return to Florence,
at the age of 50, that he seems to have found the lifestyle he
had always desired.