This Bay Village wedding venue is such a gem. Inspired by a medieval fortress, the Longwood Venues’ property is a basically a castle right in downtown Boston. This Romanesque Revival-style building was built in the 1890s as a part of the Armory of the First Corps of Cadets. According to The Boston Globe, it was used to store arms, house a rifle range, military gym, and drill hall. Now, it’s a moody fairytale wedding venue…