Cityscape

Cityscape
The Urban Savant PrC

This prestige class is linked to membership in the Red Sashes, and requires the Favored in Guild feat linked with that group. (City of Splendors describes this feat with regards to the Sashes, as well as the group itself.) As has been noted in previous discussion, the Red Sashes are a closed group--they recruit you, you don't get to just up and join them--so if you're looking to get into the class, find a DM and let them know that's a new life goal for your PC.

K-History 2 will in fact be allowed as an alternate prerequisite for bardic knowledge. The class itself notes that rogues and wizards are known to take it, which is a stupid thing to say if there's any chance Bardic-K is the only option on that line, and since Cityscape specifically lists it as an optional prerequisite, I'm fine with making it happen. (I would not be allowing it if WotC hadn't specifically put it there.)

Requested additional addendum: Will the Caster Advance levels have any similar effect to the errata used for Fortune's Friend, Master of Masks, and Cloaked Dancer?