What cinematic universe includes the characters John Wick, Winston and the Continental?

The John Wick universe, starring Keanu Reeves as a legendary assassin coming out of retirement, has expanded its mythology with each installment. The Continental is a hotel that serves as neutral territory for assassins, run by Winston (Ian McShane). The franchise has been praised for its elaborate action choreography, distinctive visual aesthetic, and detailed underworld of assassins with their own rules, currency, and codes of conduct.