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Eruptions of classical novae are possible sources of lithium formation andgamma-ray emission. Nova remnants can also become Type Ia supernovae (SNe Ia).The contribution of novae to these phenomena depends on nova rates, which arenot well established for the Galaxy. Here, we directly measure a Galactic bulgenova rate of $13.8 \pm 2.6$ per year. This measurement is much more accuratethan any previous measurement of this kind thanks to many years' monitoring ofthe bulge by the Optical Gravitational Lensing Experiment (OGLE) survey. Oursample consists of 39 novae eruptions, $\sim$1/3 of which are OGLE-baseddiscoveries. This long-term monitoring allows us to not only measure the novarate but also to study in detail the light curves of 39 eruptions and more than80 post-nova candidates. We measured orbital periods for 9 post-novae and 9novae, and in 14 cases we procured the first estimates. The OGLE survey is verysensitive to the frequently erupting recurrent novae. We did not find anyobject similar to M31 2008-12a, which erupts once a year. The lack of detectionindicates that there is only a small number of them in the Galactic bulge.

OGLE Atlas of Classical Novae I. Galactic Bulge Objects