How long has the Tudor rose existed?

The Tudor rose has been in existence for over 520 years.

The Tudor rose came about by the joining of the Houses of York and Lancaster and the amalgamation of the badges associated with each House, the white rose of York and the red rose of Lancaster. The Wars of the Roses between the Houses of York and Lancaster (over succession to the English throne) ended in 1485 with the victory of the Lancastrian Henry Tudor, who founded the House of Tudor, which subsequently ruled England and Wales for 118 years.

In order to bring a lasting peace, Henry married Elizabeth Plantagenet from the House of York and on the occasion of their wedding on 18 January 1486 adopted the new emblem of the white rose of York placed within the centre of the red rose of York as the emblem of the House of Tudor.