"It is difficult for us today to comprehend how Apollonius could
discover and prove hundreds of beautiful and difficult theorems without
modern algebraic symbolism. Nevertheless, he did so, and there is no
record of any later Greek mathematical work that approaches the
complexity and intricacy of the Conics."
Victor
J. Katz,
A History of
Mathematics, 2nd ed,
Addison, Welsey, 1998, p. 118.

Be sure to visit the Pergamon Museum
if you are in Berlin to see a spectacular reproduction of the ancient
city. 