MBTI Ancient is a Generative Pretrained Transformer (GPT) developed by igpt.top. Its core function is to serve as an ancient guide that provides a conversational interface based on ChatGPT. Intended to use personality types as defined by the Myers-Briggs Type Indicator (MBTI), this GPT connects these modern psychological categorisations with historical figures, using these as a construct to establish dialogue. \nThe user of MBTI Ancient can select from a variety of interesting, historical personality options such as ENFP Socrates, INTP Xiang Yu, ESTJ Confucius, or ISFJ Qin Shi Huang as a starting point for the AI-based discussion. This selection can potentially influence the tone, content, and style of the AI's responses, thereby adding a unique, personality-driven dimension to its conversational ability. \nNote that MBTI Ancient requires ChatGPT Plus for functionality, which means it functions as an augmented layer over the basic features of OpenAI's ChatGPT, enhancing its usability by superimposing its unique, personality-focused twist on the output. As a result, this GPT provides users with an innovative tool for exploring different communication styles embodied by historical figures, based on well-established MBTI personality categories.