A detailed overview of the development of the Gorgia Toscana (GT 'Tuscan Throat') over time and space. It reexamines earlier work and considers competing hypotheses (including Etruscan substratum) about the source of the phenomenon. It concludes that there is little evidence of substratal effects. While GT continues to spread across Tuscany, the appearance of unusual fricative type outcomes is not unique to this region as is often assumed.