For those who are counting, this is the fifth new downtown Austin tower announced in the last two weeks. Today's newly announced project is a 15-story boutique hotel with 60-70 rooms. It will be constructed on Congress Avenue between fourth and fifth streets across from the Frost Bank Tower.The new hotel will be located at 416 Congress and will integrate the existing 1893 Congress Avenue facadeThe boutique hotel will integrate the 1893 Romanesque facade into a new 15-story tower to be designed . . .