P Parameswaran was honoured with Padma Vibhushan in 2018.

P Parameswaran, one of the senior-most "pracharaks" of the Rashtriya Swayamsevak Sangh (RSS) and former leader of the erstwhile Bharatiya Jana Sangh, died at 91 in the early hours today, Sangh Parivar sources said.

The founder director of the Bharatheeya Vichara Kendram died at 12.10 am while undergoing Ayurvedic treatment at Ottappalam in Kerala's Palakkad district, according to sources.

P Parameswaran, who had worked with leaders like Deendayal Upadhyaya, Atal Bihari Vajpayee and LK Advani during the Jana Sangh days, was honoured with Padma Vibhushan, the country's second highest civilian award in 2018 and Padma Shri in 2004.

Fondly called as Parameswar ji by Sangh Parivar and Bharatiya Janata Party leaders, he was a prolific writer, poet, researcher and a widely-respected RSS ideologue. He was the Bharatiya Jana Sangh's secretary (1967-1971) and vice0president (1971-1977), as well as the director of the Deendayal Research Institute (1977-1982) in New Delhi.

Born in 1927 in Muhamma, Alappuzha district, he joined the RSS during his student days.

His body will be brought to the RSS headquarters in Kochi this morning for people to pay their last respects. The cremation will be held in Muhamma in the evening, sources said.

During the days of Emergency between 1975-77, he courted arrest as part of the all India Satyagraha against it and was jailed for 16 months.

Bharatheeya Vichara Kendram was established by P Parameswaran in 1982 "to promote nationalist thoughts among Keralites".