I was at Battle for the 900th anniversary back in 1966 where i remember some King or Prince was attending. Just 12 year old and was buying a set of Hastings stamps to post from Battle. There were 6 stamps for that issue. Of course, these investment first day covers etc are now worthless and often in charity shops at 50p and still no buyers.
My parents used to take me on many historic sites for holidays in the 60s . It improved my History and Geography knowledge at School a lot.