251 Possible domain structure in p-wave superconductors with broken time-reversal symmetry is intensively discussed in literature in connection with failed experimental attempts to detect stray magnetic fields in Sr2RuO4, which were theoretical predicted for these materials. This puts in question the very idea of p-wave pairing. The lecture starts from the short overview of the domain-structure concept in normal ferromagnets, then switches to domains in systems with coexistence of ferromagnetism and superconductivity (superconducting ferromagnets), and finally addresses domain structure and stray magnetic fields in p-wave superconductors, in which ferromagnetism originates from the electron orbital moment but not from spin. Tage Erlander Award Conference "Frontiers of Condensed Matter Physics" Edouard Sonin (Racah Inst. Hebrew University of Jerusalem) None