Ivan Konstantinovich Aivazovsky (Armenian: Հովհաննես Այվազովսկի 1817-1900) Coffee house by the Ortakoy Mosque in Constantinople
There is speculation that a segment of Homer's Iliad speaks about a potion made from coffee beans. Later sources however, place the early drink in Arabian Peninsula. At first, somewhere between 575-850 C.E., it is said that the beans were crushed & mixed with fat, making a kind or "energy bars" used as an revigorant by warriors.
To turn coffee into a drink, coffee beans were boiled & fermented to obtain a kind of wine used as a medicine or as a stimulant. Later, when coffee users became aware of its content of caffeine, they roasted the beans & ground them very finely, then boiled the grounds to make coffee.