Minarets...

Been reading about these on Wikipedia.com:
"Minarets (Arabic manara (lighthouse) منارة, but more usually مئذنة) are distinctive architectural features of Islamic mosques. Minarets are generally tall spires with onion-shaped crowns, usually either free standing or much taller than any surrounding support structure."






"As well as providing a visual cue to a Muslim community, the call to prayer is traditionally given from the top of the minaret. In some of the oldest mosques, such as the Great Mosque of Damascus, minarets originally served as watchtowers illuminated by torches (hence the derivation of the word from the Arabic nur, meaning "light"). In more recent times, the main function of the minaret was to provide a vantage point from which the muezzin can call out the adhan, calling the faithful to prayer. In most modern Mosques, the adhan is called not in the minaret, but in the musallah, or prayer hall, via a microphone and speaker system."
"In a practical sense, these are also used for natural air conditioning. As the sun heats the dome, air is drawn in through open windows and up and out of the shaft, thereby causing a natural ventilation.

Minarets have been described as the "gate from heaven and earth", and as the Arabic language letter alif (which is a straight vertical line)."

The photos in this post are all minarets I can see from our roof in Khartoum. This one's not too clear, but there are two spires in front of a highrise.