Congress is celebrating its 126th Foundation Day today. Party Chief Sonia Gandhi unfurled party flag at a function at its head quarters in New Delhi. Top Congress leaders including Prime Minister Dr Manmohan Singh, Union Ministers Pranab Mukherjee, A K Antony, S Jaipal Reddy, Kapil Sibal, G K Vasan, Kantilal Bhuria, Vayalar Ravi, Sachin Pilot, Delhi Chief Minister Shiela Dixit and senior leaders R K Dhawan and M L Fotedar were among those present. The Prime Minister Dr Manmohan Singh and Mrs. Gandhi distributed sweets to children who had joined the function at the party headquarters. Mrs Gandhi also laid the foundation stone for the new party headquarters in the capital. A series of functions and welfare programmes are being launched across the country to mark the occasion. The Indian National Congress was founded in 1885 by Englishman Allan Octavio Hume, a noted ornithologist and a civil servant in British India.