courtesy of (someone or something)
1. Provided by. All the film scenes in the documentary are courtesy of Paramount Pictures. For the new school year, we're all getting new laptops courtesy of a local charity.
2. Due to someone or something. We were able to remodel the gym courtesy of very generous alumni donations.
courtesy of somebody/something
1 (also by courtesy of somebody/something) with the official permission of somebody/something and as a favour: The pictures have been reproduced by courtesy of the British Museum.
2 given as a prize or provided free by a person or an organization: Win a weekend in Rome, courtesy of Fiat.
3 as the result of a particular thing or situation: Viewers can see the stadium from the air, courtesy of a camera fastened to the plane.