Gandhi remembered, Sonia pays tribute
Gandhi, 64, was there for about 15-20 minutes at the memorial along with Prime Minister Manmohan Singh and senior BJP leader LK Advani.
Chief minister Sheila Dikshit and Union urban development minister Kamalnath were also present at the memorial among others.
Leaders of various religions also offered prayers at the Gandhi samadhi.
After the prayers, Advani was seen talking to Gandhi apparently enquiring about her health.
Gandhi had undergone a surgery for undisclosed aliment in August and returned to the capital last month.
Though she had attended a couple of meetings with top Congress leaders, she had not attended any public function so far.