You could call it the Pia Wallen effect, after the popular Swedish designer who’s made the cross (‘crux’) a recurring motif in her products; or it may just be a continuum in the longtime romance that modernists have conducted with the grid. Whatever its root cause, there’s no doubt that cross or plus symbols seem to be everywhere. Modwall’s Plus Design Mosaics are a nice addition to this trend. For those of us who prefer our bathrooms, in particular, in all-white, what could be cleaner (or purer?) than an expanse of white crosses?