I want to know the answer to the following question:
When did Belon make his shipbuilding observations?
All the background I'm provided with is that "One hundred years after the fall of Constantinople in 1453, Pierre Belon described in his work Observations in 1553 that pissasphalto, a mixture of pitch and bitumen, was used in Dubrovnik for tarring of ships from where it was exported to a market place in Venice where it could be bought by anyone.". Is that enough to answer the question?
Answer: yes