Explore the world's most extraordinary luxury homes and properties for sale. Experience international lifestyles including waterfront, golf or ski luxury homes, properties and estates. For those who seek an exceptional home and life, there is only Sotheby’s International Realty. The Sotheby’s International Realty® is a global luxury real estate company with a brand’s that goes back to 1744, when the venerable Sotheby's Auction House was established. The brand was founded in 1976 to service the real estate needs of the most prestigious clientele in the world.