• General Relativity Group, University of Southampton - Includes information about the group's research areas, staff, events, and collaborations. Research areas include gravitational waves, black holes, and numerical relativity.
  • Gravity Probe B at Stanford University - Research group devoted to a satellite experiment testing specific predictions of general relativity. Includes press information and outreach resources.
  • UTB Relativity Group - Relativity research at the University of Texas, Brownsville. Includes information on staff, research topics, and education. Research is focused on gravitational waves, from the simulation of sources to data analysis.
  • TUB Relativity and Quantum Group - Relativity group at the Technical University, Berlin, with information about the group's research, group members, seminars, and publications.
  • Gravitation and Relativity Group, University of Cologne - The group's main research interests are quantum gravity, black holes, cosmology, mathematical foundations of relativity, as well as scientific computing. Information about the group members, their research and teaching, and seminars.
  • Gravitational Physics Group, Vienna University - Includes information about the group's location and members. Research is in mathematical and numerical classical relativity.
  • General Relativity and Cosmology Group, Buenos Aires - Information about the research activities, members and publications of the General Relativity and Cosmology Group at the University of Buenos Aires, Argentina. Research focuses on cosmology and exact solutions of nonlinear differential equations related thereto.
  • Pennsylvania State University: Institute for Gravitational Physics & Geometry - Includes lists of staff, publications lists, visitor information and event announcements, as well as brief descriptions of the research undertaken, which concentrates on gravitational wave physics, quantum gravity and the physics of black holes.
  • Relativistic Astrophysics Department at Sternberg Astronomical Institute - Relativity group at Moscow State University. Pages give information on staff members, the group's history, and seminars. Research includes the physics of neutron stars, accretion disks, and cosmology.
  • UCSB Gravity Group - Gravitational Physics research at the University of California, Santa Barbara; includes information on group members and their research interests, as well as on upcoming events. Research focuses on quantum gravity, black holes, and quantum cosmology.
  • Astrophysics, Relativity and Cosmology Research Group - Relativity group at the University of Montana. Page features a brief description, and links to group members' pages and to the LISA calculator. Research interests include gravitational waves and neutron stars.
  • University of Utah Relativity Group - Includes a list of members as well as information about the group's seminars and publications. Research interests include quantum gravity, black holes, and gravitational waves.
  • Ann Arbor Area Relativity Group - Loose association of physicists from a variety of institutions in the Ann Arbor Area. Page contains list of participants, past talks, and links to further resources; members' research interests include black holes, singularities, quantum gravity, numerical relativity, relativistic astrophysics and mathematical relativity.
  • Egyptian Relativity Group - Joint group for Egyptian scientists working in the field of general relativity. In its present state, the site contains information about the group's members and activities.
  • Institute of Cosmology and Gravitation, University of Portsmouth - Includes information about research areas and seminars, as well as a staff list. Research covers a wide range of topics in theoretical, observational and mathematical aspects of cosmology and astrophysics.
  • Gravity Group at the University of Massachusetts, Dartmouth - Group specializes in black hole physics and quantum cosmology; page gives list of group members and external links.
  • TAPIR Group at Caltech - Theoretical AstroPhysics Including Relativity; includes information about group members, research topics and opportunities, seminars, and publications. Research topics include compact objects, cosmology, numerical relativity, and gravitational waves.
  • Astrophysics and Relativity Group at the Racah Institute of Physics - Relativity group at The Hebrew University of Jerusalem. Research interests include cosmology and general relativity; site offers information about group members and seminars.
  • Gravity Theory Group at the University of Maryland - Includes information about the group's members, the PhD program, seminars, and available positions. Research topics include the cosmology of the early universe, numerical relativity, and quantum gravity.
  • Pittsburgh Astrophysics and Cosmology Group - Includes information about Jeff Winicour's relativity group, whose focus of research is numerical relativity.
  • Gravitational Physics Group at Cardiff University - Includes brief articles on the group's research, links to resources, and information about members, course offerings and collaborations. Research is focused on black holes and gravitational waves.
  • Relativity and Gravitation Group at the Politecnico di Torino - Relativity group in Turin, Italy. Includes information about group members, seminars, and publications. Research topics are the foundations of relativity, gravitomagnetism, alternative theories of gravitation, and gravitational waves.
  • Dulkyn: Scientific Center for Gravitational-Wave Research - Gravitational Wave Center at the Academy of Sciences of Tatarstan. Research includes the detection of gravitational waves from astrophysical sources and the observation of variations in the Earth's gravitational field. Site features project description, information about experiments, and bibliography.
  • Australian International Gravitational Research Centre - Information about the centre's research, which focuses on gravitational waves; also includes more general information about members, events and outreach activities.
  • UWM Center for Gravitation and Cosmology - Relativity group at the University of Wisconsin, Milwaukee. Includes information on staff, events, collaborations and publications. Research interests include gravitational waves, quantum gravity, and cosmology.
  • Relativity research group at Loughborough University - Contains links to group members' web pages. Research is mainly in mathematical relativity.
  • Center for Relativity and Geometric Physics Studies - Relativity group at the National Central University of Taiwan. Information about group members, visitors, and events. Research topics include generalizations of Einstein's theory of gravity and the concept of energy in general relativity.
  • Fundamental Physics Group at ZARM - Group at the Center of Applied Space Technology and Microgravity in Bremen, Germany, which participates in relativity-related experiments.
  • Astrophysics & Relativity Theory at Cornell - Contains illustrated list of members and information about research projects. Research focuses on black hole simulations, plasma astrophysics, and certain types of gravitational wave sources.
  • QMUL Relativity Group - Pages of the Cosmology, Gravitation and Relativity Group at Queen Mary, University of London, with information on the group's members, research and PhD projects. The group's focus is on various aspects of cosmology.
  • Chair of Theory of Relativity and Gravitation at Warsaw University - Includes information about group members and seminars. Research interests include mathematical foundations of relativity, cosmology, and quantum gravity.
  • Illinois Relativity Group - Includes list of staff members, publications and seminars, also a large collection of interesting movies derived from numerical simulations.Main research topics are numerical relativity and the physics of compact objects.
  • Department of General Relativity and Astrophysics at the Jagellonian University - Relativity group in Cracow, Poland; features information about the current members of the group. Research interests include mathematical aspects of gravitational collapse and gravitational waves.
  • Prague Relativity Group - Contains a brief history of relativity in Prague, as well as information about members, seminars and publications.
  • ANU Centre for Gravitational Physics - Relativity at the Australian National University in Canberra; information about research, members and publications. Research is focussed on methods for detecting gravitational waves.
  • Institute for Gravitational Research, University of Glasgow - Research is focused on gravitational waves and their sources. Page includes information about group members, publications and collaborations.
  • University of Texas at Austin - Center for Relativity - Includes a staff list, information on projects, seminar and publication lists, and related software information. Research is focused on computer simulations of compact objects, such as binary black holes, and the gravitational waves they produce.
  • General Relativity and Gravitation at FaMAF - Information about members, publications and events from the relativity group at the Faculty of Mathematics, Astronomy and Physics of the National University of Cordoba, Argentina. Research interests include mathematical relativity and alternative theories of gravity.
  • Syracuse Relativity Group - Includes staff information, descriptions of research being undertaken, information on colloquia and brief descriptions of relevant courses. Research interests include classical and quantum gravity, cosmology, and gravitational waves.
  • Newcastle Cosmology and Quantum Gravity - Relativity group at the University of Newcastle. Includes information about members, publications and courses. Research interests are the earliest universe, the interior of black holes, and various aspects of quantum field theory.
  • UNAM Department of Gravitation and Field Theory - Relativity group at the National Autonomous University of Mexico (UNAM). Includes information about staff, research projects, publications and seminars. Research interests include black holes, cosmology, quantum gravity, and numerical relativity.
  • Max Planck Institute for Gravitational Physics (Albert Einstein Institute) - Institute of the Max Planck Society, located in Potsdam and Hannover. Research topics are mathematical relativity, gravitational waves, numerical relativity and quantum gravity. Includes staff and seminar list.
  • Gravitational Physics in Thessaloniki - Information about members, research interests and publications of the relativity group at the Aristotle University of Thessaloniki. Main research topics are the astrophysics of gravitational wave sources and related data analysis issues.
  • Relativity at the University of New Brunswick - Bare-bones page with a list of members and contact information . Research interests include mathematical relativity, quantum gravity, and cosmology.
  • University of Cape Town Cosmology and Gravity Group - Relativity group in Cape Town, South Africa. The main focus is cosmology, including observational cosmology and cosmological applications of string theory. Includes staff list, description of activities and information about seminars.
  • Tufts Institute of Cosmology - Information about staff, collaborations, and job openings.
  • LSU Experimental & Theoretical General Relativity - Relativity group at Louisiana State University. Includes links to staff pages as well as information about seminars and courses. Research focuses on the physics of compact objects and the detection of gravitational waves.
  • Gravitation and Cosmology Group, University of Barcelona - Includes information about members, research, and open positions.
  • Mathematical Physics Group, University of Oxford - Incorporates the relativity and quantum physics groups at the Mathematical Institute. Features a members list as well as information about seminars and publications. Main research topics are string theory and twistor theory.
  • WFU Gravitation and Astroparticle Physics - Relativity and astrophysics group at Wake Forest University. Research interests include black holes, quantum field theory, and the early universe; pages give information about staff members and academic programs.
  • Relativistic Hydrodynamics at the Max Planck Institute for Astrophysics, Munich - Group specializes in simulation of phenomena such as supernovae, neutron stars and jets. Page includes detailed descriptions of research projects and interesting movies.
  • The 5D Space-Time-Matter Consortium - Loosely bound group of physicists and astronomers working on a five-dimensional version of general relativity in the tradition of Kaluza and Klein; pages hosted by P. S. Wesson (University of Waterloo).
  • Relativity and Gravitation at the Universitat de les Illes Balears - Research group specializing in numerical relativity, the cosmology of inhomogeneous universes, and gravitational wave astronomy. Includes information on group members, seminars, and job openings.
  • Cambridge Relativity Group - Features links to relevant conference announcements, brief descriptions of research areas, staff list and a publications index. Research interests include quantum gravity, the physics of black holes, cosmology, and numerical relativity.
  • Relativity Group at the University of Jena - Includes information about members, seminars, and job openings. Group specializes in gravitational wave research, numerical relativity and relativistic astrophysics.