Sotheby's International Realty, Santa Fe, is Northern New Mexico's premier real estate firm. Specializing in sales in Downtown, the Historic Eastside, Las Campanas, Tesuque, and all other neighborhoods where Santa Feans call home.The Sotheby’s International Realty® brand’s rich history goes back to 1744, when the venerable Sotheby's Auction House was established. The Auction House founded the brand in 1976 to service the real estate needs of the most prestigious clientele in the world.