Top politicians gathered at the ‘Sadaiv Atal’ memorial, New Delhi to pay floral tributes to late prime minister Atal Bihari Vajpayee on his 100th birth anniversary on Thursday. President Droupadi Murmu, Vice President Jagdeep Dhankhar and Prime Minister Narendra Modi, along with other dignitaries are scheduled to reach Sadaiv Atal Memorial to pay their tributes to the former prime minister.