Across

1 In Roman houses, a decoration meant to evoke the countryside
4 Ship with three sets of oars
8 Clay jars used to transport goods
11 An ancient Roman silver coin
12 To sell
13 Piracy
16 Sailor
17 Buyer
21 A golden coin
22 Public food supply
24 Ancient Roman baths
25 Instrument used to scrape off dirt or oil
26 Ancient Roman god of the sea
27 River
28 Port city on the Mediterranean

Down

2 Changing room at ancient Roman bath
3 Earliest Roman aqueduct
4 Warm room at ancient Roman bath
5 Cold room at ancient Roman bath
6 Main sewer system through ancient Rome
7 A port-tax on imports and exports
9 Regional market days
10 Underground canals or drains
14 Merchant, businessman
15 Ship used to carry materials for trade
18 Business
19 Canals or ditches
20 Hot room at ancient Roman bath
21 Water
23 Navigation