Professor Martin Rees, Master of Trinity College Cambridge, today unveiled a special plaque in Grantham to honour Sir Isaac Newton.
The ceremony took place at The George Centre, followed by a blessing and dedication by Canon Christopher Andrews from St Wulfram's Church.
The unveiling of the Grantham Civic Society blue plaque took place in front of a host of dignitaries and a crowd of onlookers.
Professor Rees said in his speech: "I am pleased to be part of the Gravity Fields festival and to be invited to unveil this plaque.
"It is great that Newton's home town is working to boost his prestige.
"Newton was plainly the greatest scientific intellect of the second millennium.
"He had a unique intellect and his great work was the foundation of modern science and, in particular, my science astronomy."
Professor Rees is Master of Trinity College, Cambridge – where Newton studied - and, like Grantham's famous scientist, is a past President of the Royal Society.
Louise Mumford, Chairman of Grantham Civic Society, gave a short speech about Newton and his life.
The plaque will be moved to a permanent home on the wall of ASK restaurant in High Street – the site of the apothecary shop owned by Mr Clark where a young Newton lodged between 1655 and 1660.
It is one of a series funded by Grantham Future.