Your email address was collected when you booked online to visit a Cadw site and this is used to send you a link to the post visit survey.
Casglwyd eich cyfeiriad e-bost pan wnaethoch archebu ar-lein i ymweld â safle Cadw a defnyddir hwn i anfon dolen i’r ‘arolwg ar ôl ymweld’ atoch.