Thomas Archer was an English architect known for his work in the late 17th and early 18th centuries. He is best recognized for his contributions to the design of churches and public buildings, particularly in the Baroque style. His notable works include the St. John's Church in Hackney and the Church of St. Mary in Islington. Archer's architectural style often featured grand facades and intricate detailing, reflecting the artistic trends of his time. He played a significant role in the development of English architecture, influencing future generations of architects with his innovative designs and emphasis on symmetry and proportion.