They are locally called "Pancha Pandava Rathas", though they have no relation to the Pandavas.
The one visible here is the "DharmaRaja Ratha" or the proper "Dravida Vimana" carved incomplete under the patronage of the Pallava King NarasimhaVarman I.
In temple building activity, the "Purna Kumbha" is the last element to be completed.
The placing of PurnaKumbha on the central top of the Shikhara of the temple called "Kendra Garbha", officially means the Final closure of the roof.
1. Pumshila when hit with a stone sounds like Metal Iron. This stone is used for making the "Moola Viraats" (Main deities) of temple.
That's the reason, all the Moola Viraats make such sound.
Pumshilas are strong, suitable for making Life Size Murtis.
2. StriShila sounds like a Brass vessel.
They are used for making the "Devi" Murtis or the Consorts of Moola Viraats. In General the Devi Murtis are lesser in size in comparison to Moola Viraats. So, a smaller shila with lesser quality will do.
As we think #FreeHinduTemples is not just the issue. The Temple Problems are Multi Level & Multi Fold. Mainly the way they are preserved, renovated & cared.
The step motherly treatment of Hindu Temples can be felt from the photos Shared here.
1. These 1000 yrs old Ashapuri Temples built by Pratiharas & Paramars are yet to be renovated.
2. The mutilated Murtis from this temple complex lie in utterly neglected state in a small compound few Kms away. Look at the condition of Murtis @wiavastukala
After 1000 yrs of plunder, Ransack and Mutilation of Hindu temples & illegal construction of Masjids/Churches over the desecrated temples, PV Narasimha Rao Govt came up with "Places of Worship Ac" in 1991.
This act is so biased & against the "Religious Freedom" that it prohibits Hindus from claiming their own "Temples" which are under illegal occupation.