In Memory of Ruggiero de Ritis -- The Lectures -- Radiative Spacetimes -- Instantons and Scattering -- The Early Universe, the Present Universe -- 2D Dynamical Triangulations and the Weil-Petersson Measure -- Nöther Conserved Quantities and Entropy in General Relativity -- Spinors, Supergravity and the Signature of Space-Time -- VIRGO: An Interferometric Detector of Gravitational Waves -- Oscillation and Instabilities of Relativistic Stars -- Active Galactic Nuclei and the Properties of Supermassive Black Holes -- Huygens' Principle and MAPLE's NPspinor Package -- Hamiltonian Structure of 2+1 Dimensional Gravity -- Covariant Quantum Mechanics and Quantum Symmetries -- Anti-de Sitter Quantum Field Theory and the AdS-CFT Correspondence -- Geodetic Contributions to Gravitational Experiments in Space -- The r-modes Oscillations and Instability: Surprises from Magnetized Neutron Stars -- Strong Field Gravity and Quasi-Periodic Oscillations from Low-Mass X-ray Binaries -- What Have We learned about Gamma Ray Bursts from Afterglows? -- Gravitational Waves and the Death-Spiral of Compact Binaries -- Gravity in Anti-de-Sitter Space and Quantum Field Theory -- Black Hole Formation in Supernovae: Prospects of Unveiling Fallback Emission -- Advanced Readout Configurations for the Gravitational Wave Detector AURIGA -- Classical Relativity -- Connections in Distributional Bundles and Field Theories -- The Spectrum of Endstates of Spherical Gravitational Collapse -- Quantum Zeno Effect and the Detection of Gravitomagnetism -- Sagnac, Gclock Effect and Gravitomagnetism -- Radiation from an Electric Charge -- Trajectories for Relativistic Particles in an Electromagnetic Field -- Relativistic Astrophysics and Cosmology -- A Determination of any Physical Characteristics of Magnetic Monopole in Basis of Metrics of Curved Space-Time -- Gravitational Waves from Colored Spinning Cosmic Strings -- "Multiple Bending of Light Ray" Can Create Many Images for One Galaxy: In Our Dynamic Universe - A Computer Simulation -- Experimental Gravitation and Space Physics -- Recent Improvements on the EXPLORER Gravitational Wave Antenna -- NAUTILUS Recent Results -- The Low Frequency Facility R&D Experiment of the Virgo Project -- The Newton's Gravitational Law -- Measurement of Gravitational Interaction on mm Scale -- Quantum Relativity and Strings -- Constraint Supersymmetry Breaking and Non-Perturbative Effects in String Theory -- T-Dualization and Symmetry Breaking -- A Theory of Quantum Gravity from First Principles -- Spin Models, TQFTs and Their Hierarchical Structure -- Quantum Closed Timelike Curves in General Relativity.