Some records are tracked by Guinness World Records. The most footballs (soccer balls) juggled simultaneously is five and was achieved by Victor Rubilar (Argentina) at the Gallerian Shopping Centre in Stockholm, Sweden, on 4 November 2006. This was equaled by Marko Vermeer (Netherlands) in Amstelveen, Netherlands, on 11 August 2014 and Isidro Silveira (Spain), in Adeje, Tenerife, Spain, on 4 November 2015. Professional jugglers perform in a number of different styles, which are not mutually exclusive. These juggling styles have developed or been introduced over time with some becoming more popular at some times than others. Traditional circus-style juggling emphasises high levels of skill and sometimes large-scale props to enable the act to "fill" the circus ring. The juggling act may involve some comedy or other circus skills such as acrobatics, but the principal focus is the technical skill of the jugglers. Costumes are usually colourful with sequins. Variations within this style include the traditions from Chinese and Russian circus. Comedy juggling acts vary greatly in their skill level, prop use and costuming. However, they all share the fact that the focus of the performance is comedic rather than a demonstration of technical juggling skill. Comedy juggling acts are most commonly seen in street performance, festivals and fairs. Gentleman juggling was popular in variety theatres and usually involves juggling some of the elements of a gentleman's attire, namely hats, canes, gloves, cigars, and other everyday items such as plates and wine bottles. The style is often sophisticated and visual rather than comedic, though it has been interpreted in many different styles. French juggler Gaston Palmer, for example, gained a kind of notoriety for his comedic execution of gentleman juggling tricks. Jugglers perform themed acts, sometimes with specifically themed props and usually in themed costumes. Examples include jesters, pirates, sports, Victorians and chefs. Jugglers commonly feature in circuses, with many performers having enjoyed a star billing. Circus jugglers come from many countries and include those from Russia and other Eastern European countries, China, Latin America and other European countries. Some of the greatest jugglers from the past 50 years are from Eastern Europe, including Sergej Ignatov, Andrii Kolesnikov, Evgenij Biljauer, and Gregory Popovich. Variety theatres have a long history of including juggling acts on their billing. Vaudeville in the USA and Music halls in the UK regularly featured jugglers during the heyday of variety theatre in the first half of 20th century.