Bare windows of Sion Fort.
The Sion Hillock Fort was built under the regime of the English East India Company, between 1669 and 1677, atop a conical hillock when Gerard Aungier was the Governor of Bombay. When it was built, the fort marked the boundary between British-held Parel island and the Portuguese held Salsette Island that lay to the north across the creek.
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