Abstract: The present invention relates to novel molecules that can be employed for the prevention, alleviation, treatment and/or diagnosis of diseases, disorders and abnormalities associated with alpha-synuclein (a-synuclein, A-synuclein, aSynuclein, A-syn, ?-syn, aSyn, a-syn) aggregates, including, but not limited to, Lewy bodies and/or Lewy neurites, such as Parkinson's disease, Multiple System Atrophy, Lewy Body dementia (LBD; dementia with Lewy bodies (DLB) (“pure” Lewy body dementia), Parkinson's disease dementia (FDD)) or Diffuse Lewy Body Disease. The invention relates to alpha-synuclein binding molecules, in particular to alpha-synuclein antibodies or an antigen-binding fragment or a derivative thereof and uses thereof.