... designed as a 16" block ... 

Patchwork pattern is designed from CHRISTA QUILTS and is currently offered as a FREE PDF paper pieced pattern on her website (link above) The mock-up shown below shows the blocks with a 1" sashing added between blocks and the center motif added 1863 MODERN DRESDEN CENTER.

I designed this block with a "missing" center motif so thread colors could be changed.