The Tughlaq-era refers to a period in Indian history during the 14th century when the Tughlaq dynasty ruled over the Delhi Sultanate. This era is marked by significant political and administrative changes, including the introduction of new revenue systems and the establishment of a centralized government. The most notable rulers of this period include Ghiyas-ud-din Tughlaq, the founder, and his son Muhammad bin Tughlaq, known for his ambitious but often controversial policies. The Tughlaq-era also saw advancements in architecture, with the construction of several important structures, including the Tughlaqabad Fort.