Casa Guidi, House museum in Piazza San Felice, Florence, Italy.

Casa Guidi occupies the piano nobile of a 15th-century palazzo forming a sharp corner between via Mazzetta and via Maggio, facing Piazza San Felice. The facade, reorganised in the 19th century, has four storeys over seven bays, with two eroded stone shields bearing the Ridolfi arms. Above the main door is an 1861 plaque by Niccolò Tommaseo. The apartment's rooms were joined across two adjoining buildings in the 1840s.

The Ridolfi family built the palace in the 15th century; after the 1575 Pucci conspiracy Cosimo I de' Medici confiscated it and gave it to the Order of Santo Stefano, and Admiral Camillo Guidi bought it in 1650. In 1847 Robert and Elizabeth Barrett Browning rented the piano nobile, where their son Pen was born in 1849 and where she wrote "Casa Guidi Windows" (1851) before her death in 1861. Pen bought the house in 1893; the New York Browning Foundation acquired the apartment in 1971, and it passed to Eton College in 1993.

The Browning household was a centre of British society in Florence, though Theodosia Trollope's house was considered more carefree; the Trollopes' daughter played with Pen Browning. Elizabeth's 1851 poem "Casa Guidi Windows" takes its title from the building's windows, from which she watched the 1847 demonstrations and the return of the Habsburg-Lorraine in 1848. A piano on which Pen practised still stands in the bedroom.

Casa Guidi opens to the public from 3:00 to 6:00 p.m. on Mondays, Wednesdays and Fridays, April through November; admission is free but donations are welcome. The apartment is on the piano nobile, so expect stairs. When not used by Eton boys, it is let as a holiday flat through the Landmark Trust.

The plaque above the door was placed by the Comune of Florence in 1861, the year Elizabeth Barrett Browning died; its text was written by Niccolò Tommaseo and calls her verse a golden ring between Italy and England. Two eroded stone shields on the facade still show the arms of the Ridolfi, the family that built the house.