BLOCK Magazine is a quarterly magazine about the African-American blues tradition. It is the Netherlands' oldest blues periodical. The magazine was founded in Almelo, in the east of the Netherlands in 1975, by Rien and Marion Wisse. They frequently tour the United States and visit record companies and artists. They have interviewed more than 200 blues artists, including Solomon Burke, Robert Cray, Bo Diddley, Al Green, and Zora Young. Rien and Marion own a collection of approximately 30,000 blues related images.