Jacques DeMolay was burned at the stake on the Ile de la Cite in Paris. If you go to the one end of the island, there is a marker on the wall by the stairs:

The spot is on the large island at the bottom point. There's a small park there today:

https://www.unjourdeplusaparis.com/en/paris-reportage/iles-disparues-paris

The stairs:

http://www.mastermason.com/mmcdemolay/resources/JdM-Main-Small.jpg

Plaque:

"At this location Jacques DeMolay, the last Grand Master of the Order of the Temple, was burned March 18, 1314"

https://assets.atlasobscura.com/media/W1siZiIsInVwbG9hZHMvcGxhY2VfaW1hZ2VzL2JkZDQ1NTQxLTRkMmUtNDI5OS05OTRmLTMzN2I0ZDQ1MTJkNjI3ZGUzNzgzMzIzMzllN2IwN19JTUdfMTkwMyAoMSkuanBnIl0sWyJwIiwidGh1bWIiLCIxMjAweD4iXSxbInAiLCJjb252ZXJ0IiwiLXF1YWxpdHkgODEgLWF1dG8tb3JpZW50Il1d/IMG_1903%20(1).jpg

Jacques DeMolay was burned at the stake on the Ile de la Cite in Paris. If you go to the one end of the island, there is a marker on the wall by the stairs:

The spot is on the large island at the bottom point. There's a small park there today:

https://www.unjourdeplusaparis.com/en/paris-reportage/iles-disparues-paris

The stairs:

http://www.mastermason.com/mmcdemolay/resources/JdM-Main-Small.jpg

Plaque:

"At this location Jacques DeMolay, the last Grand Master of the Order of the Templ, was burned March 18, 1314"

https://assets.atlasobscura.com/media/W1siZiIsInVwbG9hZHMvcGxhY2VfaW1hZ2VzL2JkZDQ1NTQxLTRkMmUtNDI5OS05OTRmLTMzN2I0ZDQ1MTJkNjI3ZGUzNzgzMzIzMzllN2IwN19JTUdfMTkwMyAoMSkuanBnIl0sWyJwIiwidGh1bWIiLCIxMjAweD4iXSxbInAiLCJjb252ZXJ0IiwiLXF1YWxpdHkgODEgLWF1dG8tb3JpZW50Il1d/IMG_1903%20(1).jpg