My paper presents a diachronic study of the Left Periphery of Hungarian comparative subclauses, primarily focussing on the development of the complementisers and the operator. Adopting a cartographic approach, I will show that there were two main interrelated processes at work in the development of these subclauses, changing the initial configuration of hogy ‘that’ as a complementiser to a new one having mint ‘than’ as a C head, possibly followed by an overt operator. These two processes involve the reanalysis of mint from an operator to a complementiser by way of the relative cycle, and the appearance of new overt comparative operators due to a change in the deletion of the operator (Comparative Deletion)
