Question: What city is the Gatchina Palace Egg in?

Context paragraphs:
Antikvariat: Antikvariat (Russian: Антиквариат ) was a Russian department of the Ministry of Trade set up following the Russian Revolution to handle the sale and export of art pieces acquired by the revolutionary government from Russian museums such as the Hermitage and Gatchina Palace, from Russian churches, and from Russian elites who either had been forced to surrender them to the new government, had fled the country without them, or were executed during the revolution.  Among these state treasures were 30 of the 40 Fabergé eggs that had been held by the Moscow Armory following the abdication of the last Russian tsar, Nicholas II.

Gatchina Palace: The Great Gatchina Palace (Russian: Большой Гатчинский дворец ) was built in 1766–1781 in Gatchina town (near St. Petersburg) by Antonio Rinaldi for Count Grigori Grigoryevich Orlov who was a favourite of Catherine II.  The Gatchina Palace is located on the hill above Lake Serebryannoe.  It combines themes of a medieval castle and a country residence.  Palace interiors are exemplary of Russian classicism at the turn of 18th—19th centuries.  The Gatchina Palace was one of the favourite residences of the Imperial family.

Birch Gate: The Birch Gate (Berezoviye Gate, Russian: Берёзовые ворота ) is a stone gate located on the eastern border of the Palace Park in Gatchina, Leningrad Oblast, Russia.  The facility was built in the late 18th century by the famous architect Vincenzo Brenna and architectonics is unique among other palace and park facilities suburb of St. Petersburg.  Birch gates are considered one of the best creations of the architect in the Gatchina Palace and Park Ensemble.

Chesme Column: The Chesme Column (Russian: Чесменская колонна ) in Tsarskoye Selo commemorates three Russian naval victories in the Russo-Turkish War, 1768-1774, specifically the Battle of Chesma.  It was constructed in the Large Pond of the Landscape Park of the Catherine Palace to Rinaldi's designs over the years 1774-78.  The column should not be confused with the Chesme Obelisk in Gatchina.

Walters Art Museum: The Walters Art Museum, located in Mount Vernon-Belvedere, Baltimore, Maryland, is a public art museum founded and opened in 1934.  It holds collections established during the mid-19th century.  The Museum's collection was amassed substantially by major American art and sculpture collectors, a father and son: William Thompson Walters, (1819–1894), who began serious collecting when he moved to Paris as a nominal Southern/Confederate sympathizer at the outbreak of the American Civil War in 1861; and Henry Walters (1848–1931), who refined the collection and made arrangements for the construction of a later landmark building to rehouse it.  After allowing the Baltimore public to occasionally view his father's and his growing added collections at his West Mount Vernon Place townhouse/mansion during the late 1800s, he arranged for an elaborate stone palazzo-styled structure built for that purpose in 1905–1909.  Located across the back alley, a block south of the Walters mansion on West Monument Street/Mount Vernon Place, on the northwest corner of North Charles Street at West Centre Street.

Gatchina Palace (Fabergé egg): The Gatchina Palace egg is a jewelled, enameled Easter egg made under the supervision of the Russian jeweler Peter Carl Fabergé in 1901, for Nicholas II of Russia.  Nicholas II presented it to his mother, the Dowager Empress Maria Feodorovna, at Easter in 1901.  The egg opens to reveal a surprise miniature gold replica of the palace at Gatchina (a town south of St. Petersburg) that was built for Count Grigory Orlov and was later acquired by Tsar Paul I.  It is one of two imperial Easter eggs in the collection of the Walters Art Museum in Baltimore, Maryland.

Alexander Palace (Fabergé egg): The Alexander Palace Egg is a jewelled Easter egg made under the supervision of the Russian jeweler Peter Carl Fabergé in 1908, for the then Tsar of Russia, Nicholas II.  Nicholas presented it as an Easter gift to his wife, Alexandra Fyodorovna.  It is held in the Kremlin Armoury Museum in Moscow.

Priory Palace: Priory Palace is an original palace in Gatchina (Гатчина), Russia.  It was built in 1799 by the architect N. A. Lvov on the shore of the "Black Lake" "(Chyornoye ozero / Чёрное озеро)".  Constructed for the Russian Grand Priory of the Order of St John, it was presented to the Order by a decree of Paul I of Russia dated August 23, 1799.

Vincenzo Brenna: Vincenzo Brenna (1747 – May 17, 1820) was an Italian architect and painter who was the house architect of Paul I of Russia.  Brenna was hired by Paul and his spouse Maria Fyodorovna as interior decorator in 1781 and by the end of 1780s became the couple's leading architect.  Brenna worked on Pavlovsk Palace and Gatchina palaces, rebuilt Saint Isaac's Cathedral, and most notably created Saint Michael's Castle in Saint Petersburg.  Most of his architectural works were created concurrently during Paul's brief reign (November 1796 – March 1801).  Soon after Paul was murdered in a palace coup Brenna, renowned for fraud and embezzlement barely tolerated by his late patron, retired and left Russia for an uneventful life in Saxony.

Le faucon (opera): Le faucon (English: The Falcon , Russian: Сокол ) is an "opéra comique" in three acts by the Ukrainian composer Dmitry Bortniansky with a French language libretto by Franz-Hermann Lafermière.  It was first performed on 11 October 1786 at the Gatchina Palace in Russia by aristocratic amateur singers.  The plot is borrowed from Boccaccio's "The Decameron" (Fifth Day, 9th tale) which also served as the basis for Pierre-Alexandre Monsigny's 1771 comic opera "Le faucon" (libretto by Michel-Jean Sedaine) (and later for Gounod's "La colombe").

Supporting paragraphs: Gatchina Palace (Fabergé egg) Walters Art Museum
Answer: Mount Vernon-Belvedere, Baltimore, Maryland