Time Frames provides a reconnaissance on the conservation rules and current protection policies in more than 100 countries, with particular attention to the emerging nations and 20th century architecture. The contributions illustrate the critical issues related to the architectural listing, with a brief history of national approaches, a linkography and a short bibliography. The second part is a Short Critical Lexicography, with 12 papers written by scholars and experts on five topics: Identities (Italian tradition, Arab World, African continent, Far East; written by native authors); Heritages (typologies considered as ’children of a lesser God’: housing, industrial architecture, landscape architecture); Conservation (rights and specificities); Memories (preservation, promotion and reception); and Economy (impact).