French fort on the site of Toronto, built 1749 by Chevalier de Portneuf by order of De la Jonquiere, and named after Rouillé, Minister of Marine, at Paris. It was built of oak logs, to control the fur trade from the north and to command the portage from lake Ontario to Georgian Bay.

It is included in Bougainville's list 1757 who calls it Toronto and says that it was built to prevent the northern Indians from trading at Choueguen (Oswego), "a little fort of palisades to sell eau-de-vie to Indians for purpose of counterbalancing the commerce which they would have at Choueguen (Oswego)". He also names it fort St. Victor, a King's Post.

The fort was deserted in 1759 and soon occupied by the British. A settlement was made and was called "Muddy York" in 1793. The fort and settlement were probably abandoned for a few years after the cession of Canada until the arrival of U. E. Loyalists from the United States in 1784 who changed the name to York. It was incorporated as Toronto in 1834. Shown on maps No. 95, 119, 112 and 111.