This article explores the interrelationships between media facade, interactivity, and the public in contemporary Korean cities. A specific case that follows is the comparative approach to British media artist Julian Opie(1958-)’s two works of media facade located in Seoul. First, Opie’s Crowd (2009) is characterized by a visual spectacle unfolding in the city. It appears upon the facade of the Seoul Square, an office located across the Square of the Seoul Station, and activates it as a public sphere that is beyond simple representation. Whereas Opie’s another work Sara Walking in Bra, Pants, and Boots (2003), is located at the center of the Daehangno commercial district, and imbricatedwith the surroundings in more subtle ways. It is perceived at the level of pedestrians, and experienced not so much as a prominent spectacle but as part of everyday life. By paying attention to differing moments of interaction brought forth by various groups of people’s activities, events, or habitual encounters around Opie’s work, this article claims that one can explore the public (but most often private) nature of media facade by looking at its complex patterns and modes of experience that operate at multiple levels.