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This lecture covers the principles and applications of in-situ and ultrafast Lorentz Transmission Electron Microscopy (LTEM). Topics include dynamic imaging of magnetization, observing atoms, charges, and spins, lattice dynamics, magnetic skyrmions, stroboscopic methods, topological protection, and coherent control of skyrmions using laser pulses. The lecture also discusses the inverse Faraday effect, induced coherent magnons, and the light-control of magnetic bubbles in metallic films.