  We estimate the absolute age of the globular cluster NGC 3201 using $10,000$
sets of theoretical isochrones constructed through Monte Carlo simulation using
the Dartmouth Stellar Evolution Program. These isochrones take into
consideration of uncertainty introduced by the choice of stellar evolution
parameters. We fit isochrones with 3 detached eclipsing binaries and obtained
an age independent of distance. We also fit isochrones with differential
reddening corrected HST photometry data utilizing two different Hess diagram
based fitting methods. Results from 3 different methods analyzing 2 different
types of data agree to within $1 \sigma$, and we find the absolute age of NGC
3201 $= 11.85 \pm 0.74$ Gyr. We also perform variable importance analysis to
study the uncertainty contribution from individual parameters and we find the
distance is the dominance source of uncertainty in photometry based analysis
while total metallicity, Helium abundance, $\alpha$-element abundance, mixing
length, and treatment of helium diffusion are important source of uncertainties
for all 3 methods.
