Kasyapa IV was a king of ancient Sri Lanka, known for his reign during the 10th century. He is often associated with the construction of the famous Sigiriya rock fortress, which served as both a royal residence and a military stronghold. His rule is marked by significant architectural achievements and the establishment of a unique cultural identity. Kasyapa IV is also remembered for his tumultuous rise to power, which involved the overthrow of his father, Moggallana II. His reign was characterized by conflict and intrigue, as he faced challenges from rival factions and his own family. Despite these struggles, his contributions to Sri Lankan history remain notable.