Boy in Germany?

This photo has this on front about photographer:
Weltxmann - Wien KUK Hdfpotograph
This is on the back - it's imprinted as if about the photographer:
Telephon - 15157 Platten - N
KUK Hof-photograph
Kammerphotograph Ihrer kuk Hoheit Der
Durchlfrau Erzherzogin
Maria Josefa
Wein
XVii Hernals
Calvarienberggassee 37
Spezialitat
Moderne photographe
Die platte bleibt fur machbestellungen aufbewahrt

Do you know what language this is? Do you know the boy?