Cologne Cathedral (German: Kölner Dom, officially Hohe Domkirche St. Peter und Maria, English: High Cathedral of Sts. Peter and Mary) is a Roman Catholic church in Cologne, Germany. It is the seat of the Archbishop of Cologne and the administration of the Archdiocese of Cologne. It is a renowned monument of German Catholicism and Gothic architecture and is a World Heritage Site. It is Germany's most visited landmark, attracting an average of 20,000 people a day.

Cologne Cathedral was commenced in 1248 and left unfinished in 1473. Work recommenced in the 19th century and was completed, to the original plan, in 1880. It is 144.5 metres (474 ft) long, 86.5 m (284 ft) wide and its towers are approximately 157 m (515 ft) tall. The cathedral is the largest Gothic church in Northern Europe and has the second-tallest spires and largest façade of any church in the world. The choir has the largest height to width ratio, 3.6:1, of any medieval church.

Cologne's medieval builders had planned a grand structure to house the reliquary of the Three Kings and fit its role as a place of worship for the Holy Roman Emperor. Despite having been left incomplete during the medieval period, Cologne Cathedral eventually became unified as "a masterpiece of exceptional intrinsic value" and "a powerful testimony to the strength and persistence of Christian belief in medieval and modern Europe".

The Westminster Chorus (formerly known as the Harmony Showcase Chorus) is a men's a cappella chorus based in Westminster, California. International Chorus Champions of the Barbershop Harmony Society in 2007 and 2010, they are composed almost entirely of men under the age of 30.

The town of Westminster, in Orange County, CA has supported a barbershop chapter for almost half a century; but by the 1990s, it had an aging membership and no active performing chorus. In 2002 a small group of younger men from the Masters of Harmony chorus in nearby Santa Fe Springs, CA decided they would like to try to start a barbershop chorus with the mission of bringing younger men together to make music with others their own age. Founding member Terry Ghiselli approached the men of the Westminster chapter, which at the time only boasted 8 members, and they were glad to allow the young men to pick up and use the chapter charter in order to produce their vision of a youth-oriented chorus.

With 15 members and only a half dozen rehearsals under their belt, they competed at the SoCal West divisional contest in April 2002. The oldest member on stage was 27, the youngest 16. The average age was 20, and 6 of the singers were brand new barbershoppers. Directed by Ghiselli, they surprised the crowd by walking away with the championship trophy that day, and advancing to the Far Western District contest the following fall.