For Christmas holidays, the municipal museums of Florence will stay open for longer hours. Palazzo Vecchio will be open all days from December 22 to January 12, except December 25. Opening hours for December 22-30 and January 2-12 will be from 9am to 12am (except Thursdays, 9am-2pm). December 24 and 31, the scheduled opening hours will be 9am-7pm, while on 1 January opening is scheduled in the afternoon, 2pm-7pm.
Santa Maria Novella will be open from Monday to Thursday 9am-5.30pm, 11am-5.30pm on Friday, 9am-5pm on Saturday, 1pm-5pm on Sunday and public holidays.
The Brancacci Chapel will stay open all day (10am-5pm) on all weekdays (except Tuesday, closing day), closed on December 25, January 1 and 6.