The quote, "Probably the advantages of civilizations can be found illustrated and demonstrated under no other circumstances than so completely as in some suburban neighborhoods...", is attributed to Frederick Law Olmsted, an influential American architect born in 1822, recognized as the pioneer of landscape architecture in America, who achieved many notable accomplishments during his lifetime.
During the Franco-Prussian conflict, Italy allied with Prussia!... Italy seized Rome and established it as its capital while France was engaged in a war against Prussia, which it ultimately lost to Germany. As a result, Italy took advantage of France's vulnerability to claim the city it desired as its capital.
