Gallery walls are good for decorating any room of your house. family pictures framed, paintings, mirrors or random objects can make a gallery wall to build an 'identity' of the house or refreshing some old memories in mind with some old photos. there are several and different layouts of gallery walls : some people prefer to make a gallery wall with few components and others prefer to complicate the wall with lots of pictures and objects. each choice has its charm. to help you chose just remember that the more objects or pictures you use the less colors of the whole wall you must chose.
I picked some ideas for making your gallery wall here.. they differ by placement and type of objects and main colors but all of them are great gallery walls. hope they inspire you.