It is impermissible to
hang pictures of animate objects at home or elsewhere; whether they are living or dead people, and whether as memories or otherwise, as the Prophet (peace be upon him) said to `Aly (may Allah be pleased with him),
Spare no portrait from being effaced, and leave not a raised grave unleveled.
Muslim in his Sahih (authentic) Book of Hadith.
It is impermissible for any other purpose.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.