The processe of photosynthesis occurs in the chloroplast of a plant cell. The chloroplast is an organell filled with chlorophyll a substance that gives plants the green color. Within the chloroplast is the stroma witch contains flat green cell like parts called thylakoids ehich are stacked into grana. This is the sight of photosynthesis, within the lumen or the inside of the thylakiods.
The two photosystems disscussed later occur in the membrane of the thylakoid.