I've always found this building at the corner of 11th and Harrison to have an interesting and oddly charming facade. My imagination puts it on the English moors in a novel by one of the Brontë sisters. In looking up styles online, it seems to be Gothic Revival, which began in England and became popular in the United States. The sign on the door says, "Astoria Conservatory of Music," but I believe that the building began life as part of the First Presbyterian Church next door, which has more ornate elements of the Gothic Revival style.
Here's the Harrison Street side of the building, which happened to be in sunlight for a few minutes yesterday morning.