#13, Zlatá Ulicka, Hradcany, Prague
They call this section of Prague Zlatá Ulicka, or the Golden Lane. These cramped and charming row houses on the grounds of Prague Castle (where this 13 originates) were built in the 16th century in the Mannerism style, each painted a different bright shade. While reading up on the etymology of the place name, I came across this (allegedly dodgy) fact (bold print not mine):
Golden Lane got its name from the story of alchymists living in the street during the reign of Rudolf II who tried to make not only the philosopher stone or the elixir of youth, but also to transform metals into gold.
So ensued a stroll down Tangent Lane. Misreading the bold print (and why the y in alchemists?), I delightfully thought I'd stumbled upon the collective noun for alchemist. A murder of crows, a gaggle of geese, and now -- a story of alchemists! Further research proved inconclusive, though I did find this diverting exhaustive list of unauthorized collective nouns. An absence of waiters, a billow of smokers, an obscurity of poets.) And if you fancy adding your own suggestion, you're welcome to do so.