To see Michelangelo's David is priceless, especially on Thursdays from 19 to 22h when the entry is free. That is, if you can get there early enough because there is always a line. You must stop here if you visit the city. I leave you with a picture of David from behind. You can discover the front when you come in person to see it.
The Uffizi Gallery is a beautiful place, full of art, in a city that is a museum in itself. I loved the part of the Uffizi Gallery where you can see the Arno river and the Ponte Vecchio from the window. The bust, despite all the art is in the museum, seems most reminiscent of life outside the walls of the museum.
The archeological Museum (Florence) has one of the most important collections of Etruscan art in the world. See the Crocetta Palace, built under the Grand Duchess Marie Louise of Austria in the year 1620. Its Egyptian art collection, is the most important in Italy after that of Turín. Increased by numerous acquisitions and donations, in addition to the remains found in the archaeological campaigns in Egypt in 1885 and from 1891 to 1892 led by Schiaparelli.
Guido di Pietro (known as Fra Angelico) was a Dominican friar, born near Florence ve devoted himself to painting religious frescoes. Following in the footsteps of Alberti Renaissance painting has a natural touch that reflects movement and drama. Special care was taken in the treatment of light, which greatly influenced his followers, such as Ghirlandaio. He was born in 1390, died in 1465 and he developed to perfection the art of frescoes/murals. One of the many examples of his art is in the Convent of San Marcos, in all the cells the monks leave their mark, it's just a few steps from the Academy where you'll surely see David. Don't miss the work of this great Italian Renaissance painter.