This study examines the supply of political information programming across thirteen European broadcast systems over three decades. The cross-national and cross-temporal design traces the composition and development of political information environments with regard to the amount and placement of news and current affairs programs on the largest public and private television channels. It finds that the televisual information environments of Israel and Norway offer the most advantageous opportunity structure for informed citizenship because of their high levels of airtime and a diverse scheduling strategy. The study contributes to political communication research by establishing “political information environments” as a theoretically and empirically grounded concept that informs and supplements the comparison of “media systems.” If developed further, it could provide an information-rich, easy-to-measure macro-unit for future comparative research.