If you want something truly ancient and out-of-touch, you can easily just set it 15,000 years ago instead of 1,500 and no player will bat an eye or even notice
I am currently doing world building for a ttrpg campaign, and recently I did try to set an ancient empire 15,000 years in the past.
The basic idea was that empire A existed 15,000 years ago (them existing while the world was still covered in ice was important to the aesthetic), then they would be wiped out by empire B some time later, only for empire B to be destroyed by a great calamity. I wanted for there to be remnants of empire B still hanging around in the form of people who still worship a few of its god-kings and groups of people who still try to preserve its knowledge and maintain its infrastructure without fully understanding most of it.
The latter group was based partially on the Catholic Church preserving records after the fall of the Roman empire and partially on how the core of the Jewish religion was able to maintain a continuity of information and tradition over vast stretches of time even in the face of mass migration and social upheavals.
The problem was that I underestimated just what a vast gulf of time 15,000 years is. For one I was struggling to fill in all that time with events, and for two I realized that this knowledge preserving group would have had to existed for way longer than I was originally envisioning. Not only would they be older than the Jewish religion, they would be older than ancient Sumer. In fact you could take the entire history of the beginning of the Sumerian empire to the present day and fit it into that span of time twice over.
In the end I had to invent empire C, which refurbished some of empire B’s infrastructure before collapsing themselves, as the actual origin for the knowledge keepers. And even with that I still had to move the timeline up by thousands of years.
It’s also not any less awe-inspiring to have people who lived in an important time period. We still have living veterans of WW2, and WW2 is no less important or intriguing
The problem with that is that it would really change the dynamic of how non-elf civilizations would develop. Unless the elves are extremely insular, and even then. How do you have a plotline involving the player characters needing to delve into an ancient tomb in order to discover whether or not the current ruling family are the legitimate heirs of the kingdom when you can just ask an elf? How does the world get into that situation in the first place when you can just ask an elf?
I have two friends who take turns running DnD 5e campaigns in a shared setting who have made elves entirely extinct for that reason.
I am currently doing world building for a ttrpg campaign, and recently I did try to set an ancient empire 15,000 years in the past.
The basic idea was that empire A existed 15,000 years ago (them existing while the world was still covered in ice was important to the aesthetic), then they would be wiped out by empire B some time later, only for empire B to be destroyed by a great calamity. I wanted for there to be remnants of empire B still hanging around in the form of people who still worship a few of its god-kings and groups of people who still try to preserve its knowledge and maintain its infrastructure without fully understanding most of it.
The latter group was based partially on the Catholic Church preserving records after the fall of the Roman empire and partially on how the core of the Jewish religion was able to maintain a continuity of information and tradition over vast stretches of time even in the face of mass migration and social upheavals.
The problem was that I underestimated just what a vast gulf of time 15,000 years is. For one I was struggling to fill in all that time with events, and for two I realized that this knowledge preserving group would have had to existed for way longer than I was originally envisioning. Not only would they be older than the Jewish religion, they would be older than ancient Sumer. In fact you could take the entire history of the beginning of the Sumerian empire to the present day and fit it into that span of time twice over.
In the end I had to invent empire C, which refurbished some of empire B’s infrastructure before collapsing themselves, as the actual origin for the knowledge keepers. And even with that I still had to move the timeline up by thousands of years.
The problem with that is that it would really change the dynamic of how non-elf civilizations would develop. Unless the elves are extremely insular, and even then. How do you have a plotline involving the player characters needing to delve into an ancient tomb in order to discover whether or not the current ruling family are the legitimate heirs of the kingdom when you can just ask an elf? How does the world get into that situation in the first place when you can just ask an elf?
I have two friends who take turns running DnD 5e campaigns in a shared setting who have made elves entirely extinct for that reason.