These are the Proceedings of the scientific activities of CORFU2019, the 19th Hellenic School and Workshops on Elementary Particle Physics and Gravity, which took place from August 31st to September 25th, 2019. The Workshops were hosted by the European Institute for Sciences and their Applications (EISA) in the conference center of the former Royal Palace garden of Mon Repos in Corfu, Greece. The scientific activities consisted of a series of four events, the Workshop on Connecting Insights in Fundamental Physics: Standard Model and Beyond the Conference on Recent Developments in Strings and Gravity, the Humboldt Kolleg Frontiers in Physics: From the Electroweak to the Planck Scales and the Workshop on Quantum Geometry, Field theory and Gravity and a rich set of outreach activities (TV and radio interviews – see e.g. here - , Master Classes, a series of lectures to High School teachers and talks for the public). A dedicated cultural event by the Mantzaros Philarmonic Orchestra took place at the Grand Hall of the Ionian Academy. Several other social events were organized for all CORFU2019 activities.
We refer to the website:
http://www.physics.ntua.gr/corfu2019
for the various organizational and practical details.