useless trivia: What Word Means: A First Name - Any Of Various Rocks Or Geological Strata?

Questions

In 1884, what was referred to as ‘the tragic lamppost’?

Built in 1884, The Eiffel Tower was referred to as what?

How did the London Bridge collapse?

What did the Lloyd’s of London Insurance group start out as?

What other animal, beside a human, can stand on its head?