This is one of my favorite edifices in the Colonia Roma, across from one of its pocket-sized parks. It is most likely from the late 19th century and was badly damaged in the 1985 earthquake -- and never repaired. If you look at it head-on, it's crooked, and even appears as if it might fall down if you blew on it.
Another abandoned building in the Roma. This one is on Calle Álvaro Obregón almost at the corner of Insurgentes. Oddly, it is next door to another that is its twin, except that it is in renovated and in working order.