[Pramāṇa](https://indike.org/pramana/) › [Studies](https://indike.org/pramana/ins) › [Reference works](https://indike.org/pramana/ins.reference) › [An Encyclopaedia of Indian Archaeology](https://indike.org/pramana/ins.reference.ghosh-1989) › v1.c19.s9.6 # An Encyclopaedia of Indian Archaeology v1.c19.s9.6 An Encyclopaedia of Indian Archaeology v1.c19.s9.6 - **Language:** English ### [v1.c19.s9.6](https://indike.org/pramana/ins.reference.ghosh-1989.v1.c19.s9.6) Mostly of mud, historical fortifications have in some cases partial or full revetment of baked brick, but at ŚIŚUPĀLGARH it is of laterite blocks. However ancient PĀṬALIPUTRA had a fortification made of heavy tenoned wooden posts with nailed cross-beams. Bastions attached to the earlier fort-walls were quadrangular (one at Sirkap, Taxila, being pentagonal) but those of the later times, especially of medieval period, were circular. Traces of semicircular bastions are noticed at a corner of the inner fortification of the Kushan period at MATHURĀ. - [Previous: v1.c19.s9.5](https://indike.org/pramana/ins.reference.ghosh-1989.v1.c19.s9.5) - [Next: v1.c19.s9.7](https://indike.org/pramana/ins.reference.ghosh-1989.v1.c19.s9.7) - [Up: v1.c19.s9](https://indike.org/pramana/ins.reference.ghosh-1989.v1.c19.s9) ## Linked texts (3) - [Pāṭaliputra](https://indike.org/pramana/inp.site.pataliputra) - [Sisupalgarh](https://indike.org/pramana/inp.site.sisupalgarh) - [Sirkap](https://indike.org/pramana/inp.site.sirkap) --- Source: [https://indike.org/pramana/ins.reference.ghosh-1989.v1.c19.s9.6](https://indike.org/pramana/ins.reference.ghosh-1989.v1.c19.s9.6) · Pramāṇa