Schematic colour map of Rome's 22 rioni, with side lists grouping the names by the century of their creation, from the twelfth to the twentieth.
Roman numerals I to XXII label each rione on the coloured outline, while side panels sort the names under XII, XIV, XVI, XIX and XX Secolo. Headings read 'disponibili' and 'non ancora aperti', and a grey patch beside the river carries the words 'hic sunt leones'.
