Dear Miles
I think it is a view from Munich, the Theatinerkirche. Check here a picture from Wikipedia:
http://de.wikipedia.org/w/index.php?tit ... 0322193538"
In English: Theatine Church
I am quite certain. In front of the curch is the city wall visible. Munich started to tear down its fortification soon after the year 1800. I think the view represents the status of the 18th century. I do not think your beaker is made after 1800.
It must be a kind of a souvenir. It is made rather crude, and they point out it is made from a Thaler. This could serve two purposes: First, it indicates the minimum material value and is a couriosity, motivates "tourists", maybe pilgrims to the Theatine Church, to buy it.
If it is made of a Thaler of the 18th century it should weight around 28 grams.
Kind regards
Jörg