Rubuta ci gaba don wannan sakin layi - Masurians sun fara zama yankin a karni na 16 yayin da yake wani ɓangare na Duchy na Prussia, wani yanki na Masarautar Poland. Tsarin tsari ya fara ne a shekara ta 1565, yayin da Caspar von Nostitz ya kafa garin a ranar 15 ga Mayu, 1570. Garin Gołdap yana da wuri mai kyau a wurin da hanyoyin kasuwanci da yawa suka haɗu kusa da iyakar Prussia da Lithuania, kuma birnin ya bunƙasa da sauri. Alamar ta nuna gidan Hohenzollern da Brandenburg, yayin da harafin "S" ke tsaye ga Sigismund II Augustus, Sarkin Poland, wanda shi ne mai mulkin yankin. A shekara ta 1656, a lokacin Yakin Poland da Sweden
, Sojojin Poland a ƙarƙashin jagorancin Dymitr Jerzy Wiśniowiecki sun kasance a Gołdap.