The Rastriya Prajatantra Party, led by former deputy premier Kamal Thapa, organised a two-week-long Rastrya Swabhiman Yatra from Mechi in the east to Mahakali in the west.
"The government should declare the country a Hindu state and we will start a campaign for establishing a democratic system with the inclusion of monarchy," Thapa said addressing his supporters at the conclusion of the 2800-km-long yatra which concluded here at Bhrikutimandap.
He said the march was organised by his party to preserve "national integrity and end corruption in the country".
He also criticised Prime Minister K P Sharma Oli for signing a pact with Madhesi leader C K Raut, who heads an Alliance for Free Madhes, last week.
Hinduism is the largest religion of Nepal.
According to the 2011 census, 81.3 per cent of the Nepalese population was Hindu, 9.0 per cent was Buddhist, 4.4 per cent was Muslim, 3.0 per cent was Kiratist (indigenous ethnic religion), 1.4 per cent was Christian, 0.2 per cent was Sikhs, 0.1 per cent was Jains and 0.6 per cent followed other religions or no religion.
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