David
The Accademia Gallery had some historical musical instruments (including a Stradivari viola and violin). However, its main exhibit is Michelangelo's Statue of David. At over 5m tall it was the biggest European statue since Roman times. The statue was commissioned to be placed high in a church, but because of its magnificence it became a symbol of Florence. It was placed outside, near the government buildings. As time passed it was being degraded by the weather. Wisely, I think, in 1873 they moved it inside and left a full-size replica near the Uffizi Gallery.
I like this view because it shows David with his sling and a stone in his hand. He is yet to slay Goliath and the tension in his stance is apparent.