The cafe that Archer & Lancer Work at in Ep 11 was modeled after the Ufotable cafe in Osaka Japan. The cafe is themed after the studio of the same name that produced the series.
Interestingly, the Final Episode of the Show is the First Chapter in the Manga.
The Show was released once a Month, always on the First. This meant the 12 Episode series played for an Entire year every Month on the same day, without fail. Some Critics noted this made every Episode feel like an Event in some way.