1700-92 and 1814-30.
“II n’y a plus de Pyrénées” was Louis XIV’s [unjustified] comment on the accession of his grandson to the throne of Spain in A.D. 1700 according to Voltaire, Le Siècle de Louis Quatorze, chap. 28.
It’s actually in chapter 26.
A Study of History, Vol IX, OUP, 1954 (footnote)