Builders of which of the following temples had constructed a 4 km long incline for placing 90 tonnes of stone on top of the tallest shikhara amongst temples of its time?

The builders of the Rajarajeshvara Temple (also known as the Brihadisvara Temple) at Thanjavur, built by Chola king Raja Raja I, constructed a 4km long inclined ramp. This ramp was designed to haul a massive 90-tonne single stone block (Vimana/Shikhara capstone) to the top of the temple tower, which was the tallest structure of its kind at that time.