Founded in 1976, the Sotheby's International Realty brand is a unique luxury network of brokerage agencies offering a wide collection of luxury homes, estates and properties for sale throughout the world. With more than 670 offices and 13,000 sales associates across 49 countries and territories, our network is committed to helping its clients find a home and luxury real estate agent in the world's most desired locations. Our purpose is to artfully unite extraordinary properties with extraordinary lives – servicing the needs of the most prestigious clientele in the world. Click here to see more SIR brand videos.