Question

what are the four major pillars of history

Answer 1

THERE ARE FOUR ASHOKA PILLARS. THEY ARE:
ASHOKA PILLAR IN SARANATH:
The national emblem of India and a mark of Emperor Ashoka's visit to Sarnath, this 50 m tall pillar crafted out of a stone is an impressive structure.
ASHOKA PILLAR IN ALLAHABAD:
Placed outside the Allahabad Fort, this 16th century structure was constructed by Emperor Akbar. The exterior of the Ashoka Pillar has inscriptions from Ashoka in the Brahmi script. Even Samudragupta and Jahangir have added some inscriptions later in the Gupta script, a refined version of Brahmi.
ASHOKA PILLAR IN SANCHI:
This pillar was put up in the 3rd century and its structure is influenced by the Greco Buddhist style. A remnant of Sanchi's ancient history, this pillar still stands strong and appears newly built despite being centuries old. It also resembles the Sarnath pillar a lot.
ASHOKA PILLAR IN VAISHALI:
King Ashoka became a great follower of Buddhism after the massacre of Kalinga and erected his one his famous Ashokan pillar in Vaishali which was to memorialize the last sermon of Lord Buddha that took place here.
NICE QUESTION DEAR.