This volume collects a selection of papers concerning the history of linguistics spanning the centuries from the 17th to the 20th. These contributions were presented and debated at ICHo LS XV (Milan, 23 – 27 August 2021). The essays focus on various contexts across the modern and contemporary ages in Europe, Asia, and the United States. This collection offers an accurate exploration of linguistic topics and metalinguistic traditions across diverse historical and geographical settings.