Been there, didn't do that

There was a fire (today? last night? How do I refer to time when my laptop is 14 time zones away from where an event happened?) in the National Hangul Museum in Seoul, sparked by some sort of construction activity. Everything on the 3rd & 4th floors was burned. I walked by that museum in June, looked at the entrance, thought about it, and then walked on to whatever had been my planned destination. I have a pretty clear idea in my head of where it was. Now I'm wondering about sprinkler pipes.

Roman numeral mnemonic

I'd like to credit the person who wrote this, but the person who re-posted it didn't cite anyone