Originally conceived in the mid-1800s to honor Tsarevich Nicholas Alexandrovich (who died in Nice), the St. Nicholas Russian Orthodox Cathedral wasn't completed until the early 20th century.

On Sunday, it's open to the public from 1 to 7 p.m. Tickets cost approximately 10 euros (or close to $11), or you can combine your visit with a ticket to also include the Silk Museum and the ...