
The New York obelisk at Alexandria in the late 1850s. Source: PPOC
Historic photos are essential for research on monument weathering. With free internet access to archives, such photos are now easier to find than previously. Below, I will show the case of Cleopatra’s Needle, a famous Ancient Egyptian obelisk transferred to New York in 1880. Its severe weathering occupied Erhard Winkler, a pioneer on the history of monument weathering. But Winkler overlooked a key photo that would have seriously altered his interpretations. Continue reading











