1920 AD., Germany, Weimar Republic, Erfurt (city), Notgeld, collector series issue, 50 Pfennig, Grabowski/Mehl 344.5-1/2. 142632 Obverse

State: Germany, Weimar Republic
Issuer: Erfurt (city) (PrS / Th) Stadt
Location of issue: Erfurt (city)
Date of issue: 9.4.1920 AD.,
Value: 50 Pfennig
Size: 90 x 70 mm
Material: paper
Watermark: -
Serial : -
Serial no. : 142632 ( 6 digits )
Signatures: (2)
Printer: Otto Richters & Co., Erfurt , designer Alfred Hanf
Obv.: / / / …. , Erfurt street views flanking text, serial and signatures below.
Rev.: / / / …. , Erfurt cathedral, Severi church and Prediger church, arms six-spoked wheels flanking.
References: Grabowski/Mehl 344.5-1/2 .

Erfurt is the capital and largest city in the state of Thuringia, central Germany. It is located in the southern part of the Thuringian Basin, within the wide valley of the Gera river. It is located 100 km (62 mi) south-west of Leipzig, 300 km (186 mi) south-west of Berlin, 400 km (249 mi) north of Munich and 250 km (155 mi) north-east of Frankfurt. Together with a string of neighbouring cities Gotha, Weimar, Jena and others, Erfurt forms the central metropolitan corridor of Thuringia called Thüringer Städtekette (German "Thuringian city chain") with over 500,000 inhabitants.
Erfurt's old town is one of the best preserved medieval city centres in Germany.
Erfurt was first mentioned in 742, as Saint Boniface founded the diocese. Although the town did not belong to any of the Thuringian states politically, it quickly became the economic centre of the region and it was a member of the Hanseatic League. It was part of the Electorate of Mainz during the Holy Roman Empire, and later became part of the Kingdom of Prussia in 1802. From 1949 until 1990 Erfurt was part of the German Democratic Republic (East Germany).
The University of Erfurt was founded in 1379, making it the first university to be established within the geographic area which constitutes modern-day Germany. It closed in 1816 and was re-established in 1994, with the main modern campus on what was a teachers' training college. Martin Luther (1483–1546) was its most famous student, studying there from 1501 before entering St Augustine's Monastery in 1505. Other noted Erfurters include the medieval philosopher and mystic Meister Eckhart (c. 1260–1328), the Baroque composer Johann Pachelbel (1653–1706) and the sociologist Max Weber (1864–1920).
More on https://en.wikipedia.org/wiki/Erfurt

Der Erfurter Domberg, auch Domhügel, früher Unterberg genannt, liegt in der Erfurter Altstadt. Das einzigartige architektonische Ensemble aus Erfurter Dom und Severikirche mit seinen sechs Türmen bildet das Wahrzeichen der thüringischen Landeshauptstadt.
Erfurt Cathedral (German: Erfurter Dom, officially Hohe Domkirche St. Marien zu Erfurt, English: Cathedral Church of St Mary at Erfurt), also known as St Mary's Cathedral, is the largest and oldest church building in the Thuringian city of Erfurt, central Germany. It is the episcopal seat of the Roman Catholic Diocese of Erfurt. The cathedral was mainly built in the International Gothic style and is located on a hillside overlooking the main town square (Domplatz, Cathedral Square). Martin Luther was ordained in the cathedral on 3 April 1507.

Die Severikirche ist ein Kirchenbau der römisch-katholischen Kirche in Erfurt. Sie steht auf dem Domberg unmittelbar neben dem Erfurter Dom. Als einzigartiges architektonisches Ensemble bilden sie gemeinsam das Wahrzeichen der Stadt. Aufgrund ihrer ungewöhnlichen Bauform, die die spätgotische Hallenkirche vorwegzunehmen scheint, gehört die Severikirche zu den bedeutendsten gotischen Bauten in Deutschland. In einem künstlerisch sehr bedeutenden Sarkophag ruhen die Gebeine des Kirchenpatrons Severus von Ravenna.

Predigerkirche ("Preacher's Church") is a Protestant church in Erfurt, Germany. It is a monastic church to the Dominican friary, Predigerkloster, adjacent to the church. Predigerkirche was originally built by the Dominican Order in the 13th century, when the mystic Meister Eckhart was prior here. The church only became a Protestant church after the Reformation. The original building was modified in 1340–50, and the bell tower was built between 1447 and 1488. Around 1806 Predigerkirche was used as a POW camp, which led to damage to the interior and the equipment. Repairs were made around 1826.

More on https://en.wikipedia.org/wiki/Erfurt_Cathedral ; https://de.wikipedia.org/wiki/Severikirche_(Erfurt) ; https://en.wikipedia.org/wiki/Predigerkirche_(Erfurt)