Buddhist Dictionary of Pali Proper Names by G P Malalasekera
Sāhasamalla
Sāhasamalla:A king of Ceylon who belonged to the Okkāka dynasty and reigned for only two years,till he was deposed by Ayasmanta.Cv.lxxx.32; but see Cv.Trs.ii.130,n.1; the date of his accession (August 23rd,1200) is said to be the only absolutely certain date in the history of Ceylon.