Across

1 "The altar," a constellation.
5 The first day of each month in the Roman calendar.
6 Days on the Roman calendar when interest, debts, and tuition were paid.
7 In a Roman bath, this was the cold room.
10 The days in the Roman calendar that fell on the fifth seventh days of the month.
11 A central heating system invented by the Roman Gaius Sergius Orata.

Down

1 A constellation closely associated with water in many ancient cultures.
2 Queen of Ethiopia who promised Perseus that he could marry her daughter.
3 A sauna room heated by the hypocausta.
4 In a Roman bath, this was the warm room.
7 A Roman board game very similar to duodecim scripta.
8 A knucklebone used in games.
9 A month of 22 or 23 days inserted into the Roman calendar.