Bostonia Public House will unleash its historical spirit and “refined rustic” menu on the world this week, officially throwing open the doors at 4 p.m. on Thursday. The two-story space was formerly Kitty O’Shea’sand originally the Board of Trade building. The designer is HGTV’sTaniya Nayak, who has also worked on a number of other local projects, including Abby Lane, Julep Bar, and Blue Inc.. Here’s a sneak peek at the space.