Friday NIght Baroque with dissolving lines

As I am in such an inkless mood, I thought I would try a favourite Baroque facade to draw... I can't even think of the name of it but it is in Rome, near the Pantheon. This does look quite different from my usual Friday Night Baroque such as here and yet in essence there is only two fundamental differences.
1. instead of ink outline I used a raw umber watercolour pencil. I think my lines might be somewhat looser but not radically dfiferent
2. I am working with my watercolour paint a LOT wetter  - obviously the result of 1. above is that the lines are dissolving and the wetter paint is doing that even more.
I would like to try again with a little more control....