According to some sources, Nikola Tesla claimed that Theory of Relativity concepts were advanced 200 years prior to Einstein by the same Boscovich (Uknown source):
"the relativity theory, by the way, is much older than its present proponents. It was advanced over 200 years ago by my illustrious countryman Ru?er Boškovic’, the great philosopher, who, not withstanding other and multifold obligations, wrote a thousand volumes of excellent literature on a vast variety of subjects. Boškovic’ dealt with relativity, including the so-called time-space continuum…"
In his modern scientific thinking about the structure of the universe, Boscovich was ahead of his time: He came to the conclusion that matter is composed of particles
that have powers of attraction and repulsion, and in 1748, he proposed a model for the structure of the atom. In the 19th century, scientists were aware that Boscovich's theories of forces
prefigured modern physics by nearly two centuries. British physicist Joseph John Thomson is said to have remarked that his own theory of the atom is pure "Boscovichian."
Quote from "Theoria Philosophiae Naturalis":
"It will be found that everything depends on the composition of the forces with which these particles of matter act upon one another: and from these forces, as a matter of fact, all phenomena of Nature take their origin".