From the Contents: Part I Fabrication -- Micro-structuring and ferroelectric domain engineering of single crystal lithium Niobate -- Fabrication and characterization of self-assembled ferroelectric linear and nonlinear photonic crystals: GaN and LiNbO3 -- Part II Characterization -- Light aided domain patterning and rare earth emission based imaging of ferroelectric domains -- Part III Applications -- Nonlinear Interactions in Periodic and Quasi-Periodic Nonlinear Photonic Crystals -- Domain-engineered ferroelectric crystals for nonlinear and quantum optics.