1. Introduction
2. The zCOSMOS Type–1 AGN Sample
2.1. Photometry
3. Disentangling the AGN and Host Galaxy Emission with SED Fitting
3.1. Rest Frame K Band Luminosities
3.2. Host Galaxy Masses
4. Virial Black Hole Mass Measurements
5. Scaling Relations and Their Evolution
5.1. Flow Patterns in the $M_{\mathrm{BH}}$ - $M_{*}$ Plane
6. Systematics and Selection Effects
6.1. IMF and Galaxy Stellar Masses
6.2. Black Hole Mass Measurements
6.3. Choice of AGN SED
6.4. Selection Bias
7. Discussion and Conclusions
7.1. Our Results
7.2. Implications for Theoretical Models
7.3. Concluding Remarks