On the day it has been announced that Prince Philip is to retire from public engagements, we share pictures from his visit to the town in 2011.
Accompanying Her Majesty the Queen, the Duke of Edinburgh visited Alnwick Youth Hostel, Alnwick Castle and The Alnwick Garden.
Did you meet him during their visit or have you met him on a previous occasion? If so we would love to hear your memories - what did he say to you? What did you say to him?
If you have any pictures we would love to see them too.
In a statement, Buckingham Palace said: "His Royal Highness The Duke of Edinburgh has decided that he will no longer carry out public engagements from the autumn of this year. In taking this decision, The duke has the full support of The Queen."
"Prince Philip will attend previously scheduled engagements between now and August, both individually and accompanying the Queen. Thereafter, The duke will not be accepting new invitations for visits and engagements, although he may still choose to attend certain public events from time to time."
"The Duke of Edinburgh is patron, president or a member of over 780 organisations, with which he will continue to be associated, although he will no longer play an active role by attending engagements."
Prince Philip will be 96 on 10 June, and yesterday at Lord’s cricket ground joked that he was the "world’s most experienced plaque-unveiler".