Underground Room
Just from a quick glance, he couldn't see anything of value inside of the building, but this wasn't enough to discourage him, as he very well understood that anything valuable that might have been left behind in the past should have been hidden to some extent.
Of course, to ensure that he didn't accidentally end up triggering some kind of ancient formation that might be present inside of the ruins, he didn't dare to use his divine sense or domain to quickly search through the ruins. Instead opting to slowly look through the ruins himself so he would have a better chance of spotting any dangerous traps before he ended up triggering them.
The little divine sense he had used earlier when he had first stepped into this ancient city had mostly been concentrated around the streets and avoided any of the buildings inside of the city for this exact reason.