"Bazyliszek" in Old Town Market Square.

Bazyliszek is a Polish name for the basilisk, in Greek and European bestiaries and legends, a legendary reptile reputed to be king of serpents and said to have the power of causing death by a single glance.
In common language we also use the phrase "wzrok bazyliszka", the basilisk's glance which means a glance which kills.

There is a medieval legend about a Warsaw Bazyliszek - if interested, you can read it here: https://warsawtour.pl/en/the-basilisk-legend/