Shaking Minarets

 

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today I want to express  Shaking Minarets
The Monar Jonban (Shaking Minarets), or Menar-e-jomban, is a monument located in Isfahan, in central Iran. Construction began in the 14th century to cover the grave of Amu Abdollah Soqla. Its notable feature is that if one of the minarets is shaken, the other minaret will shake as well.

The iwan (eyvān) and porch were probably erected shortly after 1316 as
a shrine for Amu Abdollah Soqla, a hermit buried here. The brick
minarets were constructed later, and are probably of Safavid dynasty
era origin (c. 15th—17th centuries).

The iwan is 10 metres (33 ft) high and 10 metres (33 ft) in width, the
minarets are 7 metres (23 ft) taller and are 4 metres (13 ft) in
circumference.[1] The roof above the shrine contains some skilled
brickwork.
Shaking minarets

The minarets are responsible for the fame of the otherwise
architecturally unremarkable shrine. Because of the ratio between the
height and width of the minarets and the width of the iwan, if one
minaret is shaken, the other will shake in unison. This example of
coupled oscillation can be observed from ground level.

Structural damage

The wooden beams on the upper part of the minarets have been placed
there to facilitate the shaking of the minarets, but the presence of
wood in the brickwork causes other complications. The repeated shaking
has been responsible for considerable structural damage.

Shaking by visitors is in theory restricted to once every twenty
minutes. However, particularly during holidays, there is a constant
stream of people who experiment with the phenomenon. The damage is
locally believed by some to have been incurred during the periods of
occupation by British soldiers.

Imanshahr shaking minarets

There is another pair of shaking minarets also in Isfahan Province, at
Imanshahr, of the earlier Ilkhanid dynasty era. They were built during
the time of Öljaitü (1280—1316). These have lost the upper two thirds
of their height.