What do we call a point in a triangle where the length from it to the other vertices are equal?

Question

I tried a lot of research and I still can't find it.

So what do we call the middle point where the length from it to the other vertices are equal?

Here's a diagram.

What we need to find out

Does anyone know what the point is called? Is it the orthocenter, circumcenter, or centroid? Or is it something else?