This chapter discusses the complementation of adpositional phrases. Sections 33.1-33.3 will show that in the core case the complement of an adposition is a noun phrase: adpositional phrases are not common as complements of adpositions, although there is a small set of prepositions that may occur with them; adjectival phrases acting as complements of adpositions are extremely rare, if possible at all. Section 33.4 will show that complementation by finite and infinitival clauses is easily possible, but usually involves an anticipatory pronominal PP (i.e. a PP with the R-pronoun er as its complement, as in eropon it). We will also discuss formations such as voordatbefore, which are analyzed in traditional grammar as complex subordinators, but which could possibly also be analyzed as the preposition voorbefore followed by a finite clause introduced by the complementizer datthat. Although adpositional and adjectival phrases are not common as complements of adpositional phrases, they do occur as the predicative part of the so-called absolute met-construction; this will be discussed in Section 33.5.