For a gallery wall with art that works together, you can keep your subject matter the same or develop a common color palette. For instance, black and white architecture; florals; sea or beach theme; animals; portraits. That sort of thing. Also keep your frames in the same wood or silver tones for continuity.

Here is an example of a skillfully arranged gallery wall using different media and frames. The common element that ties the arrangement together is the use of black and yellow. Gorgeous!

Great advice from Bobbi and nice photo from michigammemom. Here is an art wall of maps that could be appropriate for an office.



Or perhaps one large piece of art would feel less cluttered.