  Resonant soft x-ray diffraction has been used to probe the temperature
dependent orbital and magnetic structure of $\mathrm{LaSr_{2}Mn_{2}O_7}$.
Previous crystallographic studies have shown that this material has almost no
MnO$_{6}$ oxygen displacement due to Jahn-Teller distortions at low
temperatures. Within the low-temperature A-type antiferromagnetic phase, we
found strong intensity at the $({1/4},{1/4},0)$ orbital and $LaSr_{2}Mn_{2}O_7$
magnetic reflections. This shows that even in the near absence of Jahn-Teller
distortion, this compound is strongly orbitally ordered. A fit to the Mn
$L$-edge resonance spectra demonstrates the presence of orbital ordering of the
Mn$^{3+}$ ions with virtually no Jahn-Teller crystal field in addition to
possible Mn$^{3+}$ and Mn$^{2+}$~like valence fluctuations.
