What was the national flag for the roman empire?

The Roman Empire had no national flag. The only flags were the military banners or "vexillum" or signal flags called "signum".

The Roman empire had no national flag. The only flags were the military banners or "vexillum" or signal flags called "signum".

The Roman empire had no national flag. The only flags were the military banners or "vexillum" or signal flags called "signum".

The Roman empire had no national flag. The only flags were the military banners or "vexillum" or signal flags called "signum".

The Roman empire had no national flag. The only flags were the military banners or "vexillum" or signal flags called "signum".

The Roman empire had no national flag. The only flags were the military banners or "vexillum" or signal flags called "signum".

The Roman empire had no national flag. The only flags were the military banners or "vexillum" or signal flags called "signum".

The Roman empire had no national flag. The only flags were the military banners or "vexillum" or signal flags called "signum".

The Roman empire had no national flag. The only flags were the military banners or "vexillum" or signal flags called "signum".