  I report on a large-scale search for the orbital periods (P) of most known
nova systems, by looking for significant, coherent, and stable optical
photometric modulation in two or more independent light curves taken mostly
from the large surveys of TESS, Kepler, AAVSO, SMARTS, OGLE, ASAS, and ZTF. I
have discovered 31 new orbital periods. Further, I have measured new periods
for 18 novae with evolved companions, to 30 per cent accuracy, as based on
their spectral energy distribution. Also, I have confirmed, improved, and
rejected prior claims for P in 46 novae. (As part of this effort, I recognize
that 5 novae display 1--3 coherent, significant, and transient periodicities
0.12--4.1 days, with these being mysterious as not being the orbital, spin, or
superhump periods.) In all, I have compiled a comprehensive list of 156
reliable P values for novae. The histogram of nova periods shows a minimum P at
0.059 hours (85 minutes), and a Period Gap from 0.071--0.111 days (1.70--2.66
hours). The upper edge of the Period Gap is significantly different between
novae (0.111 days), nova-like systems (0.131 days), and dwarf novae (0.141
days). A further issue from the histogram is that 31 per cent of nova systems
have evolved companions, for which there has been no models or understanding
for their current state or evolution. For the novae with red giant companions,
15-out-of-20 are in the bulge population, despite novae with main-sequence and
subgiant companions having bulge fractions near 0.11--0.32.
