Help with signature on painting, please!

I have a stack of paintings that I've been putting some of my better finds (or fav finds!) and it's been getting pretty deep, so at my girlfriend's behest I started going through them to see if there were some i could move to make the stack smaller.
This one was near the end, but I don't remember it & was hoping someone would recognize the name - or could decipher it for me?
PS - It's gotten dirty from dust while there i think, because look at last 2 photos I took closer w/flash and how much brighter they are?
Thank you - and have a great Sunday!

 

Palazzo Dario, Venice. Often painted. Signature looks like "Dacio."

Debora

 

Could it be Dario, so the name of the palazzo?

 

My usual question... Anything on the back?

Debora

 

I should have had that second cup of coffee! Thank you (and apologies.)

Debora

 

I put a picture of it up! Just a wood square taped to frame

 

I thought maybe Dario 77 too, but didn't think it might be paintings name.
It's going with the reg. paintings stack!

 

You know... I think I agree painting name not artist.

Debora