Palazzo Margherita, or palazzo Piombino, is a palazzo

Palazzo

Palazzo, an Italian word meaning a large building , may refer to:-Buildings:*Palazzo, an Italian type of building**Palazzo style architecture, imitative of Italian palazzi...

 on Via Veneto

Via Veneto

Via Veneto is one of the most famous streets in Rome, Italy.The official name is via Vittorio Veneto, after the Battle of Vittorio Veneto....

 in Rome

Rome

Rome is the capital of Italy and the country's largest and most populated city and comune, with over 2.7 million residents in . The city is located in the central-western portion of the Italian Peninsula, on the Tiber River within the Lazio region of Italy.Rome's history spans two and a half...

. It was built from 1886 to 1890 by Gaetano Koch

Gaetano Koch

Gaetano Koch was an Italian architect.He made his name above all with several major works in Rome - Palazzo Koch, seat of the Banca d'Italia, and the two porticoed palazzi which form Piazza della Repubblica, and the central Piazza Vittorio.His mark can also be seen in Rome's Palazzo Mengarini and...

 for prince Rodolfo Boncompagni Ludovisi, prince of Piombino

Piombino

Piombino is an Italian town and comune of circa 35,000 inhabitants in the province of Livorno . It lies on the border between the Ligurian Sea and the Tyrrhenian Sea, in front of Elba Island and at the northern side of Maremma.-Overview:...

, on a now-vanished portion of the Villa Ludovisi

Villa Ludovisi

The Villa Ludovisi was a suburban villa in Rome, built in the 17th century on the area once occupied by the Gardens of Sallust near the Porta Salaria...

. The high cost of the palace forced the prince to sell it to the Italian state.

The palace is named after queen Margherita of Savoy

Margherita of Savoy

Margherita of Savoy , was the Queen consort of the Kingdom of Italy during the reign of her husband, Umberto I.-Family:...

, who lived there after the assassination of her husband Umberto I

Umberto I of Italy

Umberto I or Humbert I , nicknamed the Good , was the King of Italy from 9 January 1878 until his death. He was deeply loathed in far-left circles, especially among anarchists, because of his conservatism and support of the Bava-Beccaris massacre in Milan...

 in Monza

Monza

Monza is a city and comune on the river Lambro, a tributary of the Po, in the Lombardy region of Italy some 15 km north-northeast of Milan. It is the capital of the Province of Monza and Brianza. It is best known for its Grand Prix motor racing circuit, the Autodromo Nazionale Monza.On June...

 in 1900, till her death in 1926. In 1931 it was acquired by the government of the USA and now houses the American embassy in Italy

Embassy of the United States in Rome

The Embassy of the United States of America to the Italian Republic is the diplomatic mission of the United States to Italy. The embassy's chancery is situated in the Palazzo Margherita, Via Vittorio Veneto, Rome. The current United States Ambassador to Italy is David Thorne...

 and as such is on America's Register of Culturally Significant Property

Register of Culturally Significant Property

The Secretary of State's Register of Culturally Significant Property is the United States Department of State's registry of properties that are owned or leased by the Department and have particular cultural or historical significance....

.