Disneyana is merchandise officially licensed by the Walt Disney company which could be theme park souvenirs, books, toys or even artwork. But this location wasn't always the home to collectible memorabilia inside of Disneyland. In 1955 when the park opened this was a bank.
The Disneyland Park map listed this as a bank and eventually would also become an annual pass center. Guests could do banking at Disneyland with Bank of America, which goes back to Snow White as the corporation's original banking partner. So Bank of America got a location inside of Main Street USA as an official sponsor and a financial partner with Disney.
Today you can still see the Vault inside, as well as the teller station where bank tellers used to handle checks, deposits, and withdrawals.
The corner location would become Disneyana, a sort of a merger between art gallery and retail shop.
Growing up in Los Angeles in the 70s/80s we visited Disneyland on a regular basis and often after school, before "Annual Passes".