As mentioned on the back of the postcard, the church started in a wooden building in 1859. The back of the postcard has quite a bit of history. A series of other structures led to this sanctuary built in 1925.

I’ve got two of these postcards and neither were mailed, so it’s very hard to date this image. In that the main First Baptist Church has moved to a far larger and newer structure a mile or so away, this image predates that.

Click here to learn about the First Baptist Church of Fernandina Beach:
https://www.fbfirst.com/
I could find no history mentioned on the website. It is staggering that a church with such a vast history has no mention of the history or even what year the congregation started!