  The measurement of the deflection of starlight during a total solar eclipse
on May 29, 1919 was the first verification of general relativity by an external
team of scientists, brought Einstein and his theory to the attention of the
general public, and left a legacy of experimental testing that continues today.
The discovery of gravitational lenses turned Einstein's deflection into an
important tool for astronomy and cosmology. This article reviews the history of
the 1919 measurement and other eclipse measurements, describes modern
measurements of the effect using radio astronomy, and of its cousin, the
Shapiro time delay, and discusses gravitational lenses.
