Iraq
No one can tell, it was too long ago.
the copper cylinder(cathode) and iron rod(anode)
Well, according to MythBusters in the 'Baghdad Battery' episode/myth, it was used for electric pain control, in conjunction with acupuncture.
A Baghdad battery consists of a ceramic pot, a copper cylinder, and an iron rod. When filled with an electrolyte such as vinegar or lemon juice, it generates a small electric current due to chemical reactions between the metals and the electrolyte. Though the exact purpose of these ancient batteries is still debated, they could potentially have been used for electroplating or medical purposes.
Baghdad (currently is the capital of Iraq)
a sentence for baghdad is the people live in Baghdad
baghdad
Baghdad
Baghdad is the capital of Iraq
Baghdad is the capital of Iraq.
Baghdad is a city in Iraq