At that time, Tylicz was also called Oppidium Novum and Ornawa, and was an important garrison of Polish royal army, which guarded southern border of the kingdom.

In 1363, king Casimir III the Great, who promoted settlement in this sparsely populated corner of Poland, granted Magdeburg rights to Ornawa, changing its name into Miastko.

In a document, issued by Jogaila for this occasion, Tylicz/Miastko was named Ornamentum and Novum Oppidium, and the town remained part of the vast bishophoric Muszyna Estate until the first partition of Poland (1772).

The period of relative prosperity ended in the mid-17th century, when Nowy Sącz County was suffered widespread destruction during Swedish invasion of Poland.

During Austrian rule, the town declined and lost its importance, at the expense of nearby spa of Krynica-Zdrój, which rapidly grew since the late 19th century.