  We report results from a search for Galactic high-mass eclipsing binaries.
The photometric monitoring campaign was performed in Sloan $r$ and $i$ with the
robotic twin refractor RoBoTT at the Universit\"atssternwarte Bochum in Chile
and complemented by Johnson $UBV$ data. Comparison with the SIMBAD database
reveals 260 variable high-mass stars. Based on well-sampled light curves we
discovered 35 new eclipsing high-mass systems and confirm the properties of six
previously known systems. For all objects, we provide the first light curves
and determine orbital periods through the Lafler-Kinman algorithm. Apart from
GSC 08173-0018 and Pismis 24-13 ($P = 19.47\,d$ and $20.14\,d$) and the
exceptional short-period system TYC 6561-1765-1 ($P = 0.71\,d$), all systems
have orbital periods between 1 and 9 days. We model the light curves of 26
systems within the framework of the Roche geometry and calculate fundamental
parameters for each system component. The Roche lobe analysis indicates that 14
systems have a detached geometry while 12 systems have a semi-detached
geometry; seven of them are near-contact systems. The deduced mass ratios $q =
M_2/M_1$ reach from 0.4 to 1.0 with an average value of 0.8. The similarity of
masses suggests that these high-mass binaries were created during the star
formation process rather than by tidal capture.
