  One of the remaining challenges within the standard model is to gain a good
understanding of QCD in the non-perturbative regime. One key step toward this
aim is baryon spectroscopy, investigating the spectrum and the properties of
baryon resonances. To get access to resonances with small $\pi N$ partial
width, photoproduction experiments provide essential information. In order to
extract the contributing resonances, partial wave analyses need to be
performed. Here, a complete experiment is required to unambiguously determine
the contributing amplitudes. This involves the measurement of carefully chosen
single and double polarization observables. The CBELSA/TAPS experiment with a
longitudinally or transversely polarized target and an energy tagged, linearly
or circularly polarized photon beam allows the measurement of a large set of
polarization observables. Due to its good energy resolution, high detection
efficiency for photons, and the nearly complete solid angle coverage it is
ideally suited for the measurement of photoproduction of neutral mesons
decaying into photons. Recent results for various double polarization
observables in $\pi^0$ and $\eta$ photoproduction and their impact on the
partial wave analysis are discussed.
