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Istanbul Observatory

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Hidden : 03/24/2013
2 out of 5
1.5 out of 5

Size: Size:   micro (micro)

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Geocache Description:

The Istanbul Observatory of Taqi al-Din, founded in Istanbul by Taqi al-Din Muhammad ibn Ma'ruf in 1577, was one of the largest astronomical observatories to be built in the Islamic world. However, it only existed for a few years before it was destroyed in 1580.


In 1574, Murad III became the Sultan of the Ottoman Empire. The empire's chief astronomer, Taqi al-Din, petitioned the Sultan to finance the building of a great observatory to rival Ulugh Beg's Samarkand observatory. The Sultan approved, and construction was completed in 1577, at nearly the same time as Tycho Brahe's observatory at Uraniborg.

This observatory consisted of two large structures perched on a hill overlooking the European section of Istanbul and offering a wide view of the night sky. Much like a modern institution, the main building was reserved for the library and the living quarters of the staff, while the smaller building housed a collection of instruments built by Taqi al-Din. These included a giant armillary sphere and an accurate mechanical astronomical clock for measuring the position and speed of the planets. With these instruments, Taqi al-Din had hoped to update the old astronomical tables describing the motion of the planets, sun, and moon.

The observatory did not survive to advance the development of astronomy in the Muslim world. Within months of the observatory's completion, a comet with an enormous tail appeared in the sky and Sultan Murad III demanded a prognostication about it from his astronomer. "Working day and night without food and rest" Taqi al-Din studied the comet and came up with the prediction that it was "an indication of well-being and splendor," and would mean a "conquest of Persia". Unfortunately, instead of well-being a devastating plague followed in some parts of the empire, and several important persons died. Taqi al-Din was able to carry on his observations for a few more years but eventually opponents of the observatory and prognostication from the heavens prevailed and the observatory was destroyed in 1580. Other sources give the "rise of a clerical faction," which opposed or at least was indifferent to science, and specifically to "the recommendation of the Chief Mufti" of the Ottomans, as the explanation for the destruction of the observatory.
Taqi al-Din invented a framed sextant similar to what Tycho Brahe later used as shown in the picture.
Taqi al-Din invented a framed sextant similar to what Tycho Brahe later used as shown in the picture
The ancient observatory is on the İstiklal Street, a famous street in the new part of Istanbul.
İstiklal Avenue or Istiklal Street (Turkish: İstiklâl Caddesi, French: Grande Rue de Péra, English: Independence Avenue) is one of the most famous avenues in Istanbul, Turkey, visited by nearly 3 million people in a single day over the course of weekends. Located in the historic Beyoğlu (Pera) district, it is an elegant pedestrian street, approximately three kilometers long, which houses exquisite boutiques, music stores, bookstores, art galleries, cinemas, theatres, libraries, cafés, pubs, night clubs with live music, historical patisseries, chocolateries and restaurants.

The cache is directly under a sign, which remembers the people of the Observatory.

Please put the cache back to the same place where you found it. So it is less visible.

Osmanlı İmparatorluğunun ilk rasathanesi astronom Takiyüddin tarafından bugün İstiklal Caddesinde Odakule’nin olduğu civarda kurulmuştur ve yaklaşık 1575-1580 yılları arasında faaliyet göstermiştir.

Cache, bu yeri hatırlatması için konulan işaretin altında.

Lütfen Cache'i aynı bulduğunuz yere geri bırakın. Böylece daha az görünüyor

Congratulations puczmeloun for FTF

Additional Hints (Decrypt)

Ybbx ba gur enva cvcr sbe n zntargvp zvpeb, 1 zrgre bire tebhaq. YBBX NG CUBGB BA GUR CNTR GB FRR UBJ GB BCRA NAQ PYBFR GUR PBAGNVARE. QB ABG WNZ GUR YBT!!!!!!!

Lntzhe obehfhaha nexnfvaqn, zvxangvfyv ove zvxeblh nenlva. Lreqra 1 zrger lhxnevqn.

Decryption Key


(letter above equals below, and vice versa)