This paper uses a novel argument based on nominalization to argue for a low structural position for negation in Persian. This proposal is advanced in two stages. First, the paper investigates nominalization in Persian to identify the height at which nominal structure is introduced. Using evidence from the distribution of various kinds of syntactic objects in the context of nominalization, it will be argued that nominalization occurs at the level of VoiceP (or just above it) in Persian. Next, the paper uses the findings about nominalization to provide an argument for a low position of sentential negation in the language. It will be shown that negation in Persian in included in the nominalized structure and, hence, negation has to be low. This proposal is weighed against previous accounts in the literature, which have taken negation to be high in the language.