Charles Butler was an English mathematician known for his contributions to the field of mathematics during the 18th century. He is particularly recognized for his work in geometry and for his efforts in promoting mathematical education. Butler's writings often aimed to make complex mathematical concepts more accessible to a broader audience. In addition to his mathematical pursuits, Butler was also involved in the study of astronomy and navigation. His work included the publication of several books that combined practical applications of mathematics with theoretical insights, helping to bridge the gap between these two areas. His legacy continues to influence the teaching of mathematics today.