Spectral Geometry: An Introduction and Background Material for this Volume -- Geometry Detected by a Finite Part of the Spectrum -- Spectral Geometry on Nilmanifolds -- Upper Bounds for the Poincarรฉ Metric Near a Fractal Boundary -- Construction de Variรฉtรฉs Isospectrales du Thรฉorรจme de T. Sunada -- Inverse spectral theory for Riemannian foliations and curvature theory -- Computer Graphics and the Eigenfunctions for the Koch Snowflake Drum -- Inverse Spectral Geometry -- Inverse Spectral Geometry on Riemann Surfaces -- Quantum Ergodicity