India’s former prime minister Manmohan Singh, who steered the country through sweeping reforms and paved the way for its emergence as a global economic powerhouse, has died. He was 92.

Authorities in India have declared a seven-day mourning period to honor Manmohan Singh as politicians and public paid tributes to the country’s former prime minister widely regarded as the architect of India’s economic reform program.

Manmohan Singh opened India to the world as finance minister in the 1990s and helmed the US nuclear deal and a series of key legislation as the two-term prime minister from 2004-2014