Seattle is almost as well-known as Ireland for its damp climate so Church has created street art that only appears when it's raining.
He uses a water-repellant coating to paint messages, games and illustrations on the footpaths of Seattle as part of a series entitled 'Rainworks'.
The coating is enviromentally-friendly and lasts anywhere from four months to a year.
Such a simple idea but one that is guaranteed to make you smile on a rainy day - and we definitely have enough of those over here.
If anyone's feeling inspired, you can buy the 'paint' here.