  In this work we present the observation of the Mkn 463 field performed with
the MECS instrument on-board BeppoSAX in the 1.8-10.5 keV band. The Mkn 463
field is an example of an extragalactic field crowded with absorbed X-ray
sources: apart from the Seyfert 2 galaxy Mkn 463 and the well known QSO PG
1352+183 (the only object showing no absorption), two other objects are
detected with a column density in excess to the galactic value. The first 1SAX
J1353.9+1820 is a red QSO from the BeppoSAX High Energy Large Area Survey
(HELLAS). The second 1SAX J1355.4+1815 is optically unidentified, but its X-ray
spectral characteristics indicate that it too is an AGN hidden behind a large
column density.
