This paper studies the internal structure of definite articles and demonstratives in twelve Germanic languages. Examining synchronic and diachronic data as well as systematic gaps, it seeks to illuminate the nature of definiteness markers and inflections, d-and -er in German d-er 'the' and d-ies-er 'this', with the goal of identifying some consequences for the syntax of the determiner phrase as a whole. Arguing that definiteness markers are semantically vacuous elements, the paper proposes that articles involve an inflectional head in the syntax and demonstratives consist of an inflectional and a deictic head. Isomorphic correspondences between overt components and abstract syntactic structure may be partially or completely "masked" by postsyntactic operations. *(2) a. d-er the b. d-ér, d-ieser, d-essen, d-ass, d-ort, d-ann that, this, whose, that, there, thenWith Leu (2008) and others, I argue that this commonality is not accidental. I claim that determiners have inner structure. Second, parsing the definite article from right to left, in 3a one also notices that this determiner exhibits an ending that occurs elsewhere in German: It surfaces on demonstratives, adjectives, and quantifiers, as shown in 3b.(3) a. d-er the b. d-ér, dies-er, gut-er, manch-er that, this, good, someIn other words, identical inflections appear on different lexical items (for example, Duden 1995:277). In line with the first parsing, I argue that this is not an accidental state of affairs, but that these right-most components are regular inflections. Again, I claim that determiners have internal structure. While the parsing of the definite article (d-er) and the simple demonstrative (d-ér) may not seem very revealing, the segmentation of the complex demonstrative leads to a tripartite makeup: d-ies-er. I label the element in the middle DEICTIC PART. This type of component works as an instruction for the listener to identify a specific entity that is close to the speaker (that is, proximal) or farther away (that is, distal). With Leu (2008) and Roehrs (2010), I claim that all demonstratives, including simple demonstratives, have a deictic part. Resuming the comparison of the definite article and the demonstratives, I combine these two lines of inquiry by formulating the first hypothesis:(4) Hypothesis 1a (to be amended): Synchronic Relatedness of Definite DeterminersDefinite determiners are transparent with regard to the definiteness marker and the inflection.