How was Persian literature disciplinized in the twentieth century? This article addresses this question by focusing on twentieth-century Afghanistan and outlining the sociohistorical processes that helped to transform scholarly and literary production into a social enterprise. A major outcome of these underexamined processes was the making of Dāʾerat ol-maʿāref-e Āryānā (1949–79) in Kabul, the first modern encyclopedia produced in Persian. The article explains the multilayered significance of Āryānā's literary taxonomies, reading practices, and historiographical models that reified Persian literature as an object of academic study and national veneration in Afghanistan. A close reading of Āryānā's account of Persian literary history illustrates its complex relationship with both Iranian and Afghan nationalisms of the 1940s and 1950s and its contributors’ adherence to a modern methodology. The present study places Āryānā squarely within a transregional ecosystem that brought about the institutionalization of literature in Persian-speaking lands.