How much was a loaf of bread in Germany on November 16, 1923?

About 201 billion marks.

http://tinyurl.com/jtfmhmf
books.google.co.uk/books?id=8P0n6Np1j60C&pg=PA103&lpg=PA103&dq=201+billi
on+marks+loaf+of+bread&source=bl&ots=IB7oyu_wpC&sig=6z8NxOUlhb7EllvRZA-O
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v=onepage&q=201%20billion%20marks%20loaf%20of%20bread&f=false

Oops sorry! It's now 428 billion marks - but that's inflation for you!

[ wiwiss.fu-berlin.de/w3/w3collie/MACRO/00WS/PairPathologies.PDF no longer exists ]
https://mises.org/library/when-money-dies-germany-and-paper-money-after-1910
https://www.richmondfed.org/~/media/richmondfedorg/publications/research/economic_quarterly/2002/winter/pdf/hetzel.pdf

How much is a 1923 mark compared to pounds and dollars of today...

At the peak of the German inflation the Reichsmark was valued at 4.2 trillion to the US dollar. According to this site

[ eh.net/hmit/ppowerusd/ nolonger exists ]

The 1923 dollar had the purchasing power of $10.55 today, so the 1923 mark at the height of inflation was worth about 1/400,000,000,000 of a dollar in today’s money. If the price of 428 billion marks quoted by Maggie is the price at the peak of inflation then the German of that time was paying about a dollar for a loaf in today’s prices.

http://alphahistory.com/weimarrepublic/1923-hyperinflation/
http://www.history.ucsb.edu/faculty/marcuse/projects/currency.htm