The present study sheds light on referring expressions and their interpretation in the discourse through the prism of contemporary semantic and pragmatic theories. The primary focus is on the coreferential interpretation of personal pronouns, particularly third-person pronouns (e.g., he, she, it, they) in written English architectural discourse. It is shown how these linguistic items function in the discourse and how semantic and pragmatic factors have an impact on their possible interpretation. The concepts of coreference and anaphora are analyzed. Main constraints of the interpretations of pronouns are considered and illustrated with examples. The phenomenon of referential indeterminacy related to the interpretation of personal pronouns within the discourse is examined. The study outcomes can be applied in computational semantics, particularly in compiling semantic algorithms for resolving pronominal reference and comprehension of the meaning of discourse.