President Pranab Mukherjee will visit Patna today to participate in a function to celebrate centenary of Mahatma Gandhi's Champaran Satyagraha.<br/>'<br/>A Rashtrapati Bhavan Communique said, the President will attend the felicitation ceremony to honour the freedom fighters on the occasion.<br/><br/>The Champaran Satyagraha was Mahatma Gandhi's first agitation against the British rule.<br/>