The World Catalog of Earthquake Rotated Objects (EROs) is organized into two different datasets that report the most important parameters and informations about the source earthquakes and about the observed EROs, respectively. The seismic event dataset (red stars) reports the parameters of earthquakes (magnitude, intensity, focal mechanism etc) from which EROs observations are used. The EROs dataset (yellow dots) lists several parameters and data (epicentral distance, type of object, sense of rotation etc) associated with each ERO observation. It also contains the complete reference list for each seismic event, including the citation associated with the EROs observations. The EROs Catalog is freely available at http://istituto.ingv.it/l-ingv/archivi-e-banche-dati/ or at http://istituto.ingv.it/the-institute/database/view?set_language=en. The Catalog is open to contributions from the public: in case of ERO's observations please send email to luigi.cucci@ingv.it or to andrea.tertulliani@ingv.it. When using data from the EROs Catalog please cite the following papers: Cucci L., A. Tertulliani and A.M Lombardi (2016). The first World Catalog of Earthquake-Rotated Objects (EROs), part I: outline, general observations, outlook. Bulletin of the Seismological Society of America, 106, 2, 373-385, doi:10.1785/0120150255. Lombardi A.M., L. Cucci and A. Tertulliani (2016). The first World Catalog of Earthquake-Rotated Objects (EROs), part II: statistical analyses and related interpretations. Bulletin of the Seismological Society of America, 106, 2, 386-397, doi:10.1785/0120150256.