  Two-dimensional photonic crystal with a rectangular symmetry and low contrast
(< 1) of the dielectric constant is considered. We demonstrate that, despite
the {\em absence} of a bandgap, strong localization of a photon can be achieved
for certain ``magic'' geometries of a unit cell by introducing two $\pi/2$
phase slips along the major axes. Long-living photon mode is bound to the
intersection of the phase slips. We calculate analytically the lifetime of this
mode for the simplest geometry -- a square lattice of cylinders of a radius,
$r$. We find the magic radius, $r_c$, of a cylinder to be 43.10 percent of the
lattice constant. For this value of $r$, the quality factor of the bound mode
exceeds $10^6$. Small ($\sim 1%$) deviation of $r$ from $r_c$ results in a
drastic damping of the bound mode.
