 Vague neo-Mamluk references could be detected on his own villa, which was built according to his own designs at 19 Shaykh Barakat (now Kamal al-Din Salah) Street behind Tahrir Square; the villa was demolished long ago.Herz built the head office of the former Crédit Foncier Égyptien on the corner of today's Abd al-Khaliq Tharwat and Muhammad Bey Farid Streets in downtown Cairo in the Beaux-Arts style following the designs of Carlo Prampolini.The building is still standing.