Simroungarh (variously spelled as – Simraongarh, Simraungadh, Simraongadh, Simroon, Simroun, Simara-vana-gadha, Scimangada, etc) is a Municipality with a population of 24615 in southern Bara district of Province No. 2, Nepal. The town is situated at an air distance of 28 km. towards east from Birgunj and about 90 km. south of Kathmandu. The town has immense archaeological importance where various artifacts of 11th-14th century “Simroun Kingdom” or “Kingdom of Karnatas” have been excavated, and continue to be found by people of the region. The “Simroun Kingdom” after being plundered, fled towards hills and went on to supplement the Great Malla Dynasty of the Kathmandu valley, under whose rule the valley rose to its prominence in the fields of art, craft, literature and architecture. The fortified palace area of Simroungarh has a well defined boundary locally known as “Baahi”. The area is rectangular in shape of about 5.5 km. long north-south, and 4 km. wide east-west. In addition to the fort city of Simroungarh, the kingdom of Karnatas comprise several other archaeological sites in the vicinity including Maulapur in Rautahat district & Murtiya near Barhathawa in Sarlahi district.