Raeren Pilgrims Bottle dated 1577

In 1475, Cologne was officially recognized as a Free Imperial City, a status that granted it significant autonomy within the Holy Roman Empire

Cologne Coat of Arms 1527

Source: https://de.wikipedia.org/wiki/K%C3%B6lner_Wappen#/media/Datei:K%C3%B6lner_Wappen_mit_L%C3%B6we_und_Greif_als_Wappenhalter_1527.png

Raeren Stoneware dated 1590 
Inscription transliteration: 
DEN.DPRENSSEN.VAN.ORANIEN.WASER.VAN.DUTSEN.BLVOT.VANNO159.
Inscription translation: after Gaimster 1997: ‘
The Prince of Orange, who is of German blood…’

© The Trustees of the British Museum
https://www.britishmuseum.org/collection/object/H_1855-1201-208

German stoneware, 1200-1900 : archaeology and cultural history : containing a guide to the collections of the British Museum, Victoria & Albert Museum, and Museum of London

by Gaimster, David R. M

Online access at Internet archive with this link:

https://archive.org/details/germanstoneware10000gaim