From Wiktionary, the free dictionary
Literally, “for there to be no rock left on a rock”.
- IPA(key): /nə pa ʁɛs.te pjɛʁ syʁ pjɛʁ/ ~ /nə pɑ ʁɛs.te pjɛʁ syʁ pjɛʁ/
ne pas rester pierre sur pierre
- (literary) for there to be nothing left (of a building), for there to be only ruins