The Marriage of Figaro (Italian: Le nozze di Figaro, pronounced [le nttse di fiaro] (listen)), K. 492, is a commedia per musica (opera buffa) in four acts composed in 1786 by Wolfgang Amadeus Mozart, with an Italian libretto written by Lorenzo Da Ponte. It premiered at the Burgtheater in Vienna on 1 May 1786. The opera's libretto is based on the 1784 stage comedy by Pierre Beaumarchais, La folle journe, ou le Mariage de Figaro ("The Mad Day, or The Marriage of Figaro"). It tells how the servants Figaro and Susanna succeed in getting married, foiling the efforts of their philandering employer Count Almaviva to seduce Susanna and teaching him a lesson in fidelity.

Considered one of the greatest operas ever written, it is a cornerstone of the repertoire and appears consistently among the top ten in the Operabase list of most frequently performed operas. In 2017, BBC News Magazine asked 172 opera singers to vote for the best operas ever written. The Marriage of Figaro came in at No. 1 out of the 20 operas featured, with the magazine describing the work as being "one of the supreme masterpieces of operatic comedy, whose rich sense of humanity shines out of Mozarts miraculous score".

Vienna ( (listen) vee-EN-ə; Austrian German: Wien [viːn] (listen); Austro-Bavarian: Wean [veɐ̯n]) is the national capital, largest city, and one of nine states of Austria. Vienna is Austria's most populous city, with about 2 million inhabitants (2.6 million within the metropolitan area, nearly one third of the country's population), and its cultural, economic, and political center. It is the 6th-largest city by population within city limits in the European Union.

Until the beginning of the 20th century, Vienna was the largest German-speaking city in the world, and before the splitting of the Austro-Hungarian Empire in World War I, the city had 2 million inhabitants. Today, it is the second-largest German-speaking city after Berlin. Vienna is host to many major international organizations, including the United Nations, OPEC and the OSCE. The city is located in the eastern part of Austria and is close to the borders of the Czech Republic, Slovakia and Hungary. These regions work together in a European Centrope border region. Along with nearby Bratislava, Vienna forms a metropolitan region with 3 million inhabitants. In 2001, the city center was designated a UNESCO World Heritage Site. In July 2017 it was moved to the list of World Heritage in Danger. Additionally, Vienna is known as the "City of Music" due to its musical legacy, as many famous classical musicians such as Beethoven and Mozart called Vienna home. Vienna is also said to be the "City of Dreams" because it was home to the world's first psychoanalyst, Sigmund Freud. Vienna's ancestral roots lie in early Celtic and Roman settlements that transformed into a Medieval and Baroque city. It is well known for having played a pivotal role as a leading European music center, from the age of Viennese Classicism through the early part of the 20th century. The historic center of Vienna is rich in architectural ensembles, including Baroque palaces and gardens, and the late-19th-century Ringstraße lined with grand buildings, monuments and parks.Vienna is known for its high quality of life. In a 2005 study of 127 world cities, the Economist Intelligence Unit ranked the city first (in a tie with Vancouver and San Francisco) for the world's most livable cities. Between 2011 and 2015, Vienna was ranked second, behind Melbourne. Monocle's 2015 "Quality of Life Survey" ranked Vienna second on a list of the top 25 cities in the world "to make a base within". Monocle's 2012 "Quality of Life Survey" ranked Vienna fourth on a list of the top 25 cities in the world "to make a base within" (up from sixth in 2011 and eighth in 2010). The UN-Habitat classified Vienna as the most prosperous city in the world in 2012–2013. The city was ranked 1st globally for its culture of innovation in 2007 and 2008, and sixth globally (out of 256 cities) in the 2014 Innovation Cities Index, which analyzed 162 indicators in covering three areas: culture, infrastructure, and markets. Vienna regularly hosts urban planning conferences and is often used as a case study by urban planners. Between 2005 and 2010, Vienna was the world's number-one destination for international congresses and conventions. It attracts over 6.8 million tourists a year.