Gate from heaven and earth !
A minaret is a distinctive architectural feature of mosques,usually either free standing or taller than the connected support structure.
Other than providing a visual cue to a Muslim community, the main purpose of the minaret is to provide a vantage point from which the call to prayer is made.
The earliest mosques lacked minarets, the call to prayer performed elsewhere; hadiths relay that the Muslim community of Medina gave the call to prayer from the roof of the house of Muhammad, which doubled as a place for prayer. Around 80 years after Muhammad’s death the first known minarets appeared. ( Paul Johnson, Civilizations of the Holy Land.)
The tallest minaret, at 210 metres (689 ft.) is located at the Hassan II Mosque in Casablanca, Morocco The tallest brick minaret is Qutub Minar located in Delhi, India. ( Jamal Malik, Islam in South Asia)