Atri the sage performed tapasyā (tapasya) at the confluence of Mahīsāgara (Mahisagara) and consecrated a śivaliṅga (shivalinga) by the name of Atrīśvara (Atrishwara) towards south from Koṭitīrtha (Kotitirtha). He also established a lake adjacent to Atrīśvara śivaliṅga.