Solution:The name Shankaracharya is foremost among the philosophers and religious thinkers ancient India. He was born in 788 AD in a village called Kaladi in Kerala.The doctrine of Shankaracharya is known as Advaita. It is very close to the Upanishads. The four monasteries established by Shankaracharya are considered to be the guides of Hinduism even today.
Their locations are as follows-
(1) Sringeri (Karnataka) - in the south,
(2) Dwarka (Gujarat) - in the west,
(3) Puri (Odisha) - in the east and
(4) Jyotirmath (Joshimath, Uttarakhand) - in the north.