The aim of this research is to develop an assessment instrument based on local wisdom from the Pagaruyung Palace to measure the historical thinking skills of junior high school students. The research methodology includes the use of a modified ADDIE model, starting with a needs analysis through literature review and interviews with 18 history teachers. The initial instrument was designed and validated by experts in history education, language, and evaluation. The instrument was then tested on 136 eighth-grade students in Solok Regency, and the data were analyzed using the Quest and Parcale programs to evaluate model fit, item difficulty, information function, and Standard Error of Measurement (SEM). The results indicate that the developed instrument has high validity and reliability, with a reliability value of 0.92. All items meet the established criteria and fit the expected measurement model. The integration of local wisdom enhances the relevance and effectiveness of history learning, enriching students' understanding of cultural and historical values. Therefore, the assessment instrument based on local wisdom from the Pagaruyung Palace is effective in measuring the historical thinking skills of junior high school students. This instrument provides a more accurate and contextual assessment of students' abilities to analyze, interpret, and use historical evidence.