No, it's the first several that seem to be visually wider at the top than the bottom.
Yes. After the fire, laws were passed requiring new buildings be constructed with fireproof materials such as brick, stone, marble, and limestone (and later, steel and glass). In some areas spared by the fire, some wood frame homes and buildings remain.
By "Very odd looking lines", are you seeing the glare and sunspots in the 3rd & 4th photos? Or..?