  The $\eta N$ final state is isospin-selective and thus provides access to the
spectrum of excited nucleons without being affected by excited $\Delta$ states.
To this end, the world database on eta photoproduction off the proton up to a
center-of-mass energy of $E\sim 2.3$ GeV is analyzed, including data on
differential cross sections, and single and double polarization observables.
The resonance spectrum and its properties are determined in a combined analysis
of eta and pion photoproduction off the proton together with the reactions $\pi
N\to \pi N$, $\eta N$, $K\Lambda$ and $K\Sigma$. For the analysis, the
so-called J\"ulich coupled-channel framework is used, incorporating unitarity,
analyticity, and effective three-body channels. Parameters tied to
photoproduction and hadronic interactions are varied simultaneously. The
influence of recent MAMI $T$ and $F$ asymmetry data on the eta photoproduction
amplitude is discussed in detail.
