Medical Advancements were important because they limited deaths therefore increases and strengthening the Roman population.
Creating a legal code is important because it will help to maintain and keep control of your city.
Architecture helped separate Rome from other countries it also provided entertainment for citizens.
The roads are important because it helped people travel safely and quickly.
The Roman calendar is a huge organizer and helper for Roman people. Before this everyone was on their own time.
The Roman government is also important obviously because they run everything. Without them nothing would be done. They were the first to have a Republic which made sure one person didn't get to much power.