So how did the ancient builders accomplish this task?

The ancient builders seemed almost magical in the things they had accomplished.

This sacrifice was in honor of the ancient builders.

What ancient builder could have imagined that armor would be needed here?

Why hadn't the ancient builders created an alternative?

The ancient builders' love for prime numbers is well-known; the space tunnels are marked with primes as well.

It is not definitively known how the ancient builders raised the huge wooden load bearing columns into position.

How did these ancient builders get it up here?

How could the ancient builders possibly have managed to lift these granite blocks into place, especially in such confined spaces?

For all the ancient builders' cleverness and skill, heat from the great furnaces in the basement never reached this high.