A tree stands outside the walls of the ruined Tughluqabad Fortress, constructed under Ghiyas-ud-Din in 1321 AD and abandoned in 1327 AD, in Delhi, India, Asia

An Indian man visits the dungeons of Tughluqabad Fortress, constructed under Ghiyas-ud-Din in 1321 AD and abandoned in 1327 AD, Delhi, India, Asia

Inside the Citadel (Qala-i-Ikhtiyar-ud-din), originally built by Alexander the Great but built in its present form by Malik Fakhruddin in 1305 AD, Herat, Afghanistan, Asia

Inside The Citadel (Qala-i-Ikhtiyar-ud-din), originally built by Alexander the Great, but built in its present form by Malik Fakhruddin in 1305 AD, Herat, Afghanistan, Asia

Dome, Sayfiddin Boxarziy Mausoleum and Mosque, (Sayfiddin Baxorzi and Sayf Ad Din Bokharzi), Bukhara, Uzbekistan

Mevl√¢na museum, with the blue domed mausoleum of Jalal ad-Din Muhammad Rumi, the dervish lodge, tekke, of the Mevlevi order, Konya, Turkey

Mevl√¢na museum, with the blue domed mausoleum of Jalal ad-Din Muhammad Rumi, a Sufi mystic also known as Mevl√¢na or Rumi, Konya, Turkey

Holy book of Islam, Quran, Koran, Mausoleum of Sheik Safi ad-Din, Ardabil, Iran, Persia, Asia

Gold plated cupola in the Mausoleum of Sheik Safi ad-Din, Ardabil, Iran, Persia, Asia

Gold plated cupola in the Mausoleum of Sheik Safi ad-Din, Ardabil, Iran, Persia, Asia

Shrine of saladin

Shrine of saladin

Calligraphy in Farsi on a historic gravestone in a mosque in Ardabil, Iran, Persia, Asia