Singing Christmas Tree upon the location. Since then, the singing Christmas tree concept has spread to Canada, the Philippines, South Korea, Switzerland and Sri Lanka. The most attended tree takes place in Knoxville, Tennessee, with 60,000 attendees in 2007. The first Christmas trees came to the United States in the 1740s from Moravian (now part of the Czech Republic) settlers. In 1851, the first commercial tree lot in the United States was set up in New York City. President of the United States Franklin Pierce set up the first Christmas tree in the White House in 1856. Artificial trees were first developed in
North Lawn (White House) "carpet" style flower bedding punctuated by tropical plants borrowed from the White House glass houses. President Theodore Roosevelt, who had engaged the architectural firm of McKim, Mead, and White to reconfigure and rebuild part of the White House in 1902, was induced to simplify the grounds, removing what was increasingly seen as Victorian clutter. The bedding scheme on the North Lawn was greatly simplified. Later, in 1934, President Franklin Delano Roosevelt engaged Frederick Law Olmsted, Jr. to evaluate the grounds and recommend changes. Olmsted understood the need to offer presidents and their families a modicum of privacy balancing with the