In ancient temples, the structure that houses the Deity is as important as the Deity itself. The parikrama or the walkway of the temple, the garbhagriha or the innermost shrine of the temple, the shape and the size of the idol, the mudra held by the idol and the mantra (sound) used for the consecration of the temple are the fundamental parameters of a temple. These elements are matched and built according to a certain science based upon an understanding of energies, thereby creating a powerful energy situation and facilitating inner transformation. The energies of the Dhyanalinga have been consecrated to last for more than 5000 years without any dissipation.
The elliptical dome that houses the Dhyanalinga is 76 feet in diameter and 33 feet high. It was built without the use of any steel, cement, or concrete but with brick and mud mortar stabilized with lime, sand, alum and herbal additives. It's the only structure of its kind.
The simple technology used is this -- all the bricks are trying to fall down at the same time! But, the way the bricks are aligned and balanced, they can never fall. The nature of this design ensures a lifespan of at least 5000 years for the dome.