vignette|350px|Fouilles archéologiques. vignette|350px|Théâtre romain, Alexandrie, Égypte, découvert par accident en 1960 par l'expédition polonaise égyptienne à Kom el-Dekka. L' est une discipline scientifique dont l'objectif est d'étudier l'être humain à travers l'ensemble des vestiges matériels (artéfacts et ) ayant subsisté au cours des siècles. Provenant de fouilles ou non, ces vestiges sont de nature variée : outils, ossements, poteries, armes, pièces de monnaie, bijoux, vêtements, empreintes, traces, peintures, bâtiments, infrastructures, etc.
In archaeology, a phase refers to the logical reduction of contexts recorded during excavation to nearly contemporary archaeological horizons that represent a distinct "phase" of previous land use. These often but not always will be a representation of a former land surface or occupation level and all associated features that were created into or from this point in time. A simplified description of phase would be that "a phase is a view of a given archaeological site as it would have been at time X".
An archaeological relationship is the position in space and by implication, in time, of an object or context with respect to another. This is determined, not by linear measurement but by determining the sequence of their deposition – which arrived before the other. The key to this is stratigraphy. Archaeological material would, to a very large extent, have been called rubbish when it was left on the site. It tends to accumulate in events. A gardener swept a pile of soil into a corner, laid a gravel path or planted a bush in a hole.