A Buddha-altar isn't only a place to honor one's ancestors. Within the altar, there is an area where Mt. Sumeru (the mountain at the center of the Buddhist cosmology) is represented and in the center of that area the main image is enshrined.
The discovery of calculus is often attributed to two men, Isaac Newton(natural philosopher) and Gottfried Leibniz (philosopher, logician) , who independently developed its foundations. This photo is of Isaac Newton.