A megachurch is a church with an unusually large membership that also offers a variety of educational and social activities, usually Protestant, including Evangelical. The Hartford Institute for Religion Research defines a megachurch as any Protestant Christian church having 2,000 or more people in average weekend attendance. The megachurch is an organization type rather than a denomination.
The concept originated in the mid 19th century, with the first one established in London, England, in 1861. More emerged in the 20th century, especially in the United States, and expanded rapidly through the 1980s and 1990s. In the early 21st century megachurches were widespread in the US and a growing phenomenon in several African countries, Australia, and elsewhere. In the late 2000s and early 2010s, they became more untraditional, with most newer ones having stadium type seating.
The origins of the megachurch movement, with many local congregants who return on a weekly basis, can be traced to the 19th century. There were large churches earlier, but they were considerably rarer.
The first evangelical megachurch, the Metropolitan Tabernacle with a 6,000-seat auditorium, was inaugurated in 1861 in London by Charles Spurgeon.
In the United States, in 1923, the Angelus Temple was inaugurated in 1923 with a 5,300-seat auditorium in Los Angeles by Aimee Semple McPherson.
A megachurch has been defined by Hartford Institute for Religion Research (2006) and others as any Protestant Christian church which at least 2,000 attend in a weekend. The OED suggests that megachurches often include educational and social activities and are usually Protestant and Evangelical. Globally, these large congregations are a significant development in Protestant Christianity.
Most of these churches build their building in the suburbs of large cities, near major roads and highways, to be visible to as many people as possible and easily accessible by car. Some install a large cross there with a view to evangelization and the edification of believers.