The race is underway to see which architectural firm will win the honour of redesigning Notre-Dame Cathedral, the French Gothic icon recently ravaged by fire.

We always suspected there were going to be some out-there proposals when the nation’s president opened up contest submissions to the prospect of “a new spire” and new technologies. But we didn’t think they’d include the addition of the sprawling rooftop swimming pool. Click through for the wackiest submissions so far.