Minaret

A muezzin calling to prayer, painting by Jean-Léon Gérôme
A minaret is a tower. Many mosques have minarets. Muezzins to call Muslims to prayers from minarets five times a day.
Minaret Media
Minaret at the Umayyad Mosque in Damascus
An orientalist depiction of the muezzin's call to prayer from the balcony of a minaret, 1878. Usually only one muezzin chants the azan from the balcony, back straight and not leaning on the railing.
Minaret of the Great Mosque of Kairouan in Tunisia, one of the oldest surviving minarets in the world
The Great Mosque of Samarra has a distinctive spiral minaret (848–852)
Minaret of the Kutubiyya Mosque in Marrakesh (second half of 12th century)
The Selimiye Mosque in Edirne (1574), which features the four tallest Ottoman minarets
Inside the stairway of a minaret in Mostar