In July 2018, the York Civic Trust unveiled the first rainbow plaque in the UK, commemorating Anne Lister’s union with Ann Walker. The plaque, at the church in York where the two women celebrated their bond by taking communion together, sparked controversy with its labelling of Lister as ‘gender-nonconforming entrepreneur’. Following a consultation period, a new plaque describing Lister as ‘lesbian and diarist’ was unveiled in February 2019. On 3 April 2019 (Lister’s birthday), a third plaque was presented at Shibden Hall, the house and estate she inherited from her uncle. Avoiding the controversy of the first York plaque, it described Lister as ‘diarist, businesswoman, landowner, traveller and lesbian who recorded much of her personal life in a secret code’. Lister herself repeatedly insists on the naturalness of her desire for women, as well as on her own exceptionalism. Yet her diaries also show her looking for women like her, not as sexual partners but as models (the Ladies of Llangollen) or as kindred spirits (the masculine bluestocking Miss Pickford). This chapter explores the implications and the stakes of attempts to classify and categorise Anne Lister according to past and present rubrics of gender and sexuality.