centerpiece design

I was up too late working in the layout, some of the things I tried didnt look right ,had to fix them. The design in the middle is directly under the cathedral rotunda, I drew in grids to look like it was all mosaic pieces, it wasnt perfect so today repainting the design as well.....Good news is if I hate it when I am done, I have another board and can try an all new color scheme and pattern!