This article is the result of the scientific meeting organized by the KUL, in June 2021, concerning the topic of the constitutional identity. One of the intriguing problems in constitutional law is just the problem of constitutional identity. Constitutional Identity has three functions. The most important consistent that identity determines the “core” or “nucleus” of each constitution. The answer to radical question “what is the preambule to the Polish Constitution for?” should be that it mostly serves to express constitutional identity. This the basic function of this part of the Polish Constitution. Above all, constitutional identity “emerges” from national identity. Both identities are connected with each other in the preambule of the Polish Constitution.