Abstract
This master thesis presents an original contribution to the understanding of how different types of relative pronouns in Spanish are distributed across prepositional complexes. The thesis presents a description an analysis of the simple relative 'que' and the complex relative pronouns 'el que' and 'el cual' in combination with lexical and functional prepositions, attending to syntactic, semantic and phonological factors with the goal of identifying tendencies and generalisations in their behaviour. The analysis starts from a set of real language examples obtained through corpus and compares them quantitatively and qualitatively to address the main properties of their distribution and behaviour.