Complex Intracellular Structures in Prokaryotes -- Prokaryote Complex Intracellular Structures: Descriptions and Discoveries -- Proteasomes and Other Nanocompartmentalized Proteases of Archaea -- Assembly and Disassembly of Phycobilisomes -- Chlorosomes: Antenna Organelles in Photosynthetic Green Bacteria -- Gas Vesicles of Archaea and Bacteria -- Carboxysomes and Carboxysome-like Inclusions -- Magnetosomes in Magnetotactic Bacteria -- Structure, Function and Formation of Bacterial Intracytoplasmic Membranes -- Membrane-bounded Nucleoids and Pirellulosomes of Planctomycetes -- Anammoxosomes of Anaerobic Ammonium-oxidizing Planctomycetes -- The Enigmatic Cytoarchitecture of Epulopiscium spp. -- Additional Complex Intracellular Structures -- Cytoskeletal Elements in Prokaryotes -- Cryo-electron Tomography Reveals the Architecture of a Bacterial Cytoskeleton -- Organization and Assembly of the Mycoplasma pneumoniae Attachment Organelle -- The Junctional Pore Complex: Molecular Motor of Microbial Motility -- Type III Secretion Systems: Bacterial Injection Devices for Microbe–Host Interactions -- Gas Vesicles in Actinomycetes: Not Simply a Case of Flotation in Water-Logged Soil -- Bacterial Endosymbionts in Prokaryotes.