According to De Lacy O'Leary, the horse-shoe arch was developed in Egypt under Fatimid rule and is not of Persian origin as is commonly thought.
Menurut De Lacy O'Leary, lengkungan sepatu kuda dikembangkan di Mesir di bawah pemerintahan Fatimiyah dan bukan berasal dari Persia seperti yang biasa dipikirkan.