Question: On the square's eastern side a small neoclassical temple, El Templete, marks the spot where the first Catholic mass was celebrated in 1519.
El Templete was where the first Catholic mass was celebrated in 1500.

Answer: no

Question: Where there is money, there is shopping or so it should seem.
If there is money, the people with it don't want to spend it.

Answer: no

Question: Shipbuilding and weapons manufacture were already under way; railways and telegraph lines quickly followed.
Railways followed after weapons manufacturing was already being done.

Answer:
yes