Basic coins in use — when coins are used at all — are the silver penny (or denarius) and the larger silver shilling, as well as the gold librum.

Coinage
Value
Librum, pl. libra (£)
20s. = 240d.
Shilling, pl. shillings (s.)
12d. = £1/20
Denarius, pl. denarii* (d.)
1/12s. = £1/240

* Also called penny (pl. pence).