  We study T^2 orientifolds and their moduli space in detail. Geometrical
insight into the involutive automorphisms of T^2 allows a straightforward
derivation of the moduli space of orientifolded T^2s. Using c=3 Gepner models,
we compare the explicit worldsheet sigma model of an orientifolded T^2
compactification with the CFT results. In doing so, we derive
half-supersymmetry preserving crosscap coefficients for generic unoriented
Gepner models using simple current techniques to construct the charges and
tensions of Calabi-Yau orientifold planes. For T^2s we are able to identify the
O-plane charge directly as the number of fixed points of the involution; this
number plays an important role throughout our analysis. At several points we
make connections with the mathematical literature on real elliptic curves. We
conclude with a preliminary extension of these results to elliptically fibered
K3s.
