Real Madrid Club (Royal Madrid Football Club), commonly known as Real Madrid, or simply as Real outside Spain frontiers, is a professional football club based in Madrid, Spain. Founded in 1902 as Madrid Football Club, the team has traditionally worn a white home kit since inception. The word Real is Spanish for Royal and was bestowed to the club by King Alfonso XIII in 1920 together with the royal crown in the emblem. The team has played its home matches in the 85,454-capacity Santiago Bernabéu Stadium in downtown Madrid since 1947. Unlike most European sporting entities, Real Madrid's members (socios) have owned and operated the club throughout its history. The club is the second most valuable sports team in the world, worth €2.5 billion ($3.4 billion) and the world's highest-earning football club for 2013–14, with an annual revenue of €549.5 million. The club is one of the most widely supported teams in the world. Real Madrid is one of three founding members of the Primera División that have never been relegated from the top division, along with Athletic Bilbao and Barcelona. The club holds many long-standing rivalries, most notably El Clásico with Barcelona and the El Derbi madrileño with Atlético Madrid.