Warre's is a port wine producer in Portugal's Douro Valley. The company was founded in 1670 and is one of the oldest port wine houses. Warre's is known for producing a variety of port wines, including tawny, ruby, and vintage port. Warre's ports are aged in oak casks and are known for their rich, complex flavor profile. The company is also a member of the "Port Wine Brotherhood," a group of port wine producers committed to promoting and protecting the quality of port wine.