Zayanderud

Zāyandé-Rūd or Zāyanderūd (Persian: زاینده رود, from زاینده [zɑːjændɛ] “life giver” and رود [rʊːd] “river”), also spelled as Zayandeh-Rood or Zayanderood, is the largest river on the central plateau of Iran, Isfahan Province.
The Zayandeh starts in the Zagros Mountains and flows 400 kilometres (200 mi) eastward before ending in the Gavkhouni swamp, a seasonal salt lake, southeast of Esfahan city. The Zayandeh has significant flow all year long, unlike many of Iran's rivers which are seasonal. The Zayandeh is spanned by many historical Safavid era bridges, and flows through many parks.
The Zayandeh River basin has an area of 41,500 square kilometers (16,000 sq mi), altitude from 3,974 metres (13,038 ft) to 1,466 metres (4,810 ft), an average rain fall of 130 millimeters (5 in) and a monthly average temperature of 3 °C (37 °F) to 29 °C (84 °F). There are 2,700 square kilometers (1,000 sq mi) of irrigated land in the Zayandeh River basin, with water derived from the nine main hydraulic units of the Zayandeh River, wells, qanat and springs in lateral valleys. Zayandeh River water gives life to the people of central Iran mainly in Isfahan and Yazd provinces. Water diverted per person is 240 litres (63 US gallons/53 imp gallons) per day in urban and 150 litres (40 US gallons/33 imp gallons) per day in villages. The flow of the river has been estimated at 1.2 cubic kilometres (0.30 cu mi) per annum, or 38 cubic metres (1,340 cu ft) per second.

Sheikh Lotf Allah Mosque

Sheikh Lotf Allah Mosque (Persian: مسجد شيخ لطف الّله - Masjed-e Sheikh Lotf-ollah) is one of the architectural masterpieces of Safavid Iranian architecture, standing on the eastern side of Naghsh-i Jahan Square, Isfahan, Iran.
Construction of the mosque started in 1603 and was finished in 1618. It was built by the chief architect Shaykh Bahai, during the reigh of Shah Abbas I of the Safavid dynasty.
It is registered, along with the Naghsh-i Jahan Square, as a UNESCO World Heritage Site.
Of the four monuments that dominated the perimeter of the Naqsh-e Jahan square, this one was the first to be built.
The purpose of this mosque was for it to be a private mosque of the royal court, unlike the Masjed-e Shah, which was meant for the public. For this reason, the mosque does not have any minarets and is of a smaller size. Indeed, few Westerners at the time of the Safavids even paid any attention to this mosque, and they certainly did not have access to it. It wasn't until centuries later, when the doors were opened to the public, that ordinary people could admire the effort that Shah Abbas had put into making this a sacred place for the ladies of his harem, and the exquisite tile- work, which is far superior to those covering the Shah Mosque.
To avoid having to walk across the maydān when getting to the mosque, Shah Abbas had the architect build a tunnel spanning across the piazza, from the Ali Qapu palace, to the mosque. When reaching the entrance of the mosque, one would have to walk through a passage that winds round and round, until one finally reaches the main building. Along this passage there were standing guards, and the obvious purpose of this design was for the women of the harem to be shielded as much as possible from anyone entering the building. At the main entrance of the mosque there were also standing guards, and the doors of the building were kept closed at all times. Today, these doors are open to visitors, and the passage traversing underneath the field is no longer in use.

Vank Cathedral of Isfahan

Holy Savior Cathedral (Armenian: Սուրբ Ամենափրկիչ Վանք, Surp Amenaprgich Vank; Persian: کلیسای وانک or آمنا پرکیج, Kelisa-ye Vank or Amenapergich; ), also known as Vank Cathedral and The Church of the Saintly Sisters, is the most visited cathedral in Isfahan, Iran. Vank means "cathedral" in the Armenian language.
Vank Cathedral was one of the first churches to be established in the city's Jolfa district by Armenian immigrants settled by Shah Abbas I after the Ottoman War of 1603-1605. The varying fortunes and independence of this suburb across the Zayandeh River and its eclectic mix of European missionaries, mercenaries and travelers can be traced almost chronologically in the cathedral's combination of building styles and contrasts in its external and internal architectural treatment.