1. me and my friends made a visit to thessaloniki doing sightseeing of local places and sights. 2. we were standing in front of hagia sophia watching nearby buildings when we caught a glimpse of the described object in question. 3. i immediately regarded / considered it to be some sort of ufo... 4. the object was / behaved very inconspicuous(ly); was tringle in shape, translucent / transparent in colour, with obscured outlines and unwavering lights at three apexes; it seemed to be hovering / floating over buildings, ascending, descending, leaning to sides; 5. we were surprised, making no action, just taking two photos of object (unfortunately with a digital camera with almost discharged batteries which is the reason for the images to be of very low quality; also we could not record a video...). 6. we had to leave the place for the sake of limited time.