Dominican Brother "Angelico" spent more of his career in the Dominican Friary of San Marco in Fiesole (just outside Florence).
That old friary is now a convent. You can visit the chapel just by hopping off the Firenze to Fiesole bus at the tobacco shop on the corner, which is what we did. We were the only people there. In fact, we had to bang on the door to get somebody to come and unlock the chapel for us. We like staying in the Fiesole hills and busing down to town, just like Lorenzo di Medici used to do on his Vespa.
It's better to look at art in situ than in museums. Fra Angelico's Nativity, in that chapel: