The "no parking" sign with the blue circle and red border is characteristic of many European countries. The architecture and the specific style of the street trees suggest a Mediterranean city, likely in Portugal or Spain. The mural on the building wall also points towards a vibrant urban area in Southern Europe. I suspect this is Lisbon, Portugal. I am moderately sure.

then: forward

The blue parking sign with the white 'P' is standard in Portugal. The architecture, particularly the weathered stone and the specific style of the pavement, strongly confirms a Portuguese city. The dense, leafy trees lining the street are very typical of Lisbon's older residential neighborhoods. I am now quite confident this is Lisbon, Portugal.

then: guess