Welcome to the forum , marcm82 .
Could you please give a bit more info , concerning the mat'l (s) that your item is made of & it's general size (& thickness of the glass) ?
My first impression is nautical , but the motif could be from a sorta common building theme around here (a Seattle native here) ... perhaps a piece of salvage from the former 'amusement' docks/areas on the W.Seattle waterfront (before , or after those docks & building burnt down) ?