@ponderoni, good afternoon, when I saw the photos I would have said Lysimachia vulgaris Yellow loosestrife.
Maybe its close relative Lysimachia punctata - can you get some detailed close-ups of the flowers and sepals, please?
I will try to get some better quality pics in the next day or two. In the meantime, the flowers are in a cluster at the top of the stem. No flowers along the stem.
By process of elimination, this does not look like any Lysimachia punctata I have ever encountered and definitely not L. nummuleria so . . . L. vulgaris looks like a good bet. Not very scientific though, I have to admit. Lysimachia punctata has more red at the centre than what we see in @ponderoni's photos.
