This is a file from the Wikimedia Commons. The description on its description page there is shown below.
The striped flag of Bavaria. Image File history File links Commons-logo. ...
Created by User:Boris23, based on the PD-image Image:Flag of North Rhine-Westphalia.svg created by me too.
It's easy to put a border around this flag:
This image shows a flag, a coat of arms, a seal or some other official insignia. The use of such symbols is restricted in many countries. These restrictions are independent of the copyright status of the depiction shown here.
This image is ineligible for copyright and therefore in the public domain, because it consists entirely of information that is common property and contains no original authorship.
The Free State of Bavaria (German: Freistaat Bayern), with an area of 70,553 km² (27,241 square miles) and 12. ... This is a list of all flags available here, mostly national and regional flags. ... 1899 state leaders - Events of 1900 - 1901 state leaders - State leaders by year See also: List of religious leaders in 1900 List of international organization leaders in 1900 // Africa Ashanti Confederacy - Opoku Mensa, Chair of the Committee of Administration (1896-1900) Ashanti annexed to the British Gold Coast colony in... The flags of the German states usually come in two variants: one variant (the simple striped flag) is for the use by everybody (civil flag); the other variant, showing the state arms is for government use only (state service flag). ...