What is this?
We are currently living in Germany and I have found 3 of these bugs in my house this spring. The first one was on the bathroom floor and was all dried up and dead when I found it like it had fallen out of a crack. The other two were alive and crawling around, one upstairs and one down, in hallways when I found them. I have not seen any for a month, but worry if it is some sort of harmful bug. We do have a dog and small children.
Stink Bugs or Shield Bugs from the Family Pentatomidae are harmless to humans and pets, but they do emit a disagreeable odor. They also seek shelter inside homes to hibernate over winter, which is probably why you have recently found them.