Sadayavarman Kulasekaran I (Tamil: முதலாம் சடையவர்மன் குலசேகரன்) was a Pandyan king, who ruled regions of South India between 1190–1216.
The ancient coronation hall of Pandyan kings was destroyed, the remains plowed with asses and sowed with weeds.
Inscriptions found at Kudimiyanmalai and Cheranur give graphic descriptions of the invasion and the sacking of Madurai.
Kulothunga performed a Virabhishekam (tribute of bravery) and crowned himself as Thiribhuvana veeran (Lord of Three Worlds).
This king is identified and distinguished using his meikeerthi which starts with the words poovin kizhathi (Tamil: பூவின் கிழத்தி).