Conversation so far:
when was the first bullet proof vest made
Kazimierz Żegleń was a Polish engineer, born in 1869 near Tarnopol, who invented the first bulletproof vest.
when did the engineer invent the vest
In 1893 Casimir Zeglen invented the first commercial bulletproof vest.
did the vest save any lives
The bulletproof vest saved the life of Alfonso XIII, the King of Spain - his carriage was covered with Szczepanik's bulletproof armour when a bomb exploded near it.
did the engineer do anything else besides engineering
Casimir Zeglen was a Catholic priest of St. Stanislaus Kostka Roman Catholic Church.

Question: what inspired the engineer to make the vest
Self-contained rewrite: what inspired the engineer to make the vest