Gyarah Sidi are the remains of Mughal Emperor, Humayun

Humayun

Nasir ud-din Muhammad Humayun was the second Mughal Emperor who ruled present day Afghanistan, Pakistan, and parts of northern India from 1530–1540 and again from 1555–1556. Like his father, Babur, he lost his kingdom early, but with Persian aid, he eventually regained an even larger one...

’s astrological observatory

Observatory

An observatory is a location used for observing terrestrial or celestial events. Astronomy, climatology/meteorology, geology, oceanography and volcanology are examples of disciplines for which observatories have been constructed...

, situated at a stone’s throw from Babur

Babur

Babur was a Muslim conqueror from Central Asia who, following a series of setbacks, finally succeeded in laying the basis for the Mughal dynasty of South Asia. He was a direct descendant of Timur through his father, and a descendant also of Genghis Khan through his mother...

’s Mehtab Bagh

Mehtab Bagh

Mehtab Bagh , is a charbagh located to the north of the Taj Mahal complex, across the Yamuna River.-History:It was designed as an integral part of the complex in the riverfront terrace pattern seen elsewhere in Agra, Uttar Pradesh, India. Its width is identical to that of the rest of the Taj...

, in a field on the banks of the Yamuna river in Agra

Agra

Agra a.k.a. Akbarabad is a city on the banks of the river Yamuna in the northern state of Uttar Pradesh, India, west of state capital, Lucknow and south from national capital New Delhi. With a population of 1,686,976 , it is one of the most populous cities in Uttar Pradesh and the 19th most...

.

History

Gyarah Sidi or Eleven Steps refers to the steps overlooking the hemispherical cavities in the ground from which astronomical readings could be taken. Though nowhere close to their size, Humayun’s observatory is an interesting, diminutive precursor to the massive Jantar Mantars

Yantra Mandir

The Yantra Mantra is an equinoctial dial, consisting a gigantic triangular gnomon with the hypotenuse parallel to the Earth's axis. On either side of the gnomon is a quadrant of a circle, parallel to the plane of the equator...

 at Jaipur

Jaipur

Jaipur , also popularly known as the Pink City, is the capital and largest city of the Indian state of Rajasthan. Founded on 18 November 1727 by Maharaja Sawai Jai Singh II, the ruler of Amber, the city today has a population of more than 3.1 million....

 and Delhi

Delhi

Delhi , officially National Capital Territory of Delhi , is the largest metropolis by area and the second-largest by population in India, next to Mumbai. It is the eighth largest metropolis in the world by population with 16,753,265 inhabitants in the Territory at the 2011 Census...

 built nearly 200 years later.

Humayun & Astronomy

Humayun

Humayun

Nasir ud-din Muhammad Humayun was the second Mughal Emperor who ruled present day Afghanistan, Pakistan, and parts of northern India from 1530–1540 and again from 1555–1556. Like his father, Babur, he lost his kingdom early, but with Persian aid, he eventually regained an even larger one...

was absorbed in astrology and astronomy, manifesting his passion in the most eccentric way. The business at court was not conducted according to exigencies of matter on hand but deferred to the planets:

• Sunday and Tuesday for government - As the sun regulates sovereignty and Mars is the patron of soldiers.
• Saturday and Thursday were devoted to matters of religion.

He even went so far as dressing himself and his ministers according to the colours of the planets associated with particular days.