It was September 1999 ...
Then a friend of mine was almost panicked, saying that in the mantra of his house, bees smarm, and one not get out of there, fearing the bees will be stung by them.
I got a void hive and went to the spot!
I saw that it was a small swarm of at most 2 frames that was trying to catch in a slit of the mantra, but because the mantra was made of cement, the slit was not too large and many bees did not move in.