Antonio Stradivari was a renowned Italian violin maker who lived from 1644 to 1737. His instruments are considered some of the finest in the world and are highly sought after by collectors and musicians. However, they are also very rare and expensive, with prices ranging from hundreds of thousands to millions of dollars.
The violin you have is marked "Antonius Stradiuarius Cremonensis Faceiebat Anno 16 Germany." This indicates that it was made in Germany, not Italy, and is therefore not likely to be an original Stradivarius. German violins made in the 19th and early 20th centuries were often mass-produced and are not considered to be of the same quality as those made by Stradivarius.
The value of your violin will depend on a number of factors, including its condition, age, and provenance. If it is in good condition and is genuinely old, it could be worth a few hundred dollars. However, it is unlikely to be worth anywhere near the value of an original Stradivarius.
To determine the exact value of your violin, you should take it to a qualified violin appraiser.