Background

The term Sister cities (twin cities) refers to a connection, usually cultural, between cities from different countries. The twin cities tradition began after World War II WWII, when it was clear that there was a need to create a cultural and human connection between different countries and nations.
Twin cities usually maintain cultural ties between one another, encouraging exchanges of knowledge delegations (students, etc.).
A twin city relationship is not necessarily a 1-1 relationship, and a certain city can have a large number of twin cities, for example the city of Ramla, Israel has 10 sister cities , Kfar Saba, Israel - 5 sister cities .

The status of the twin cities is shown in cities usually in the form of signs , gardens , , trees planted to mark the covenant , plaques , donation of statues or monuments from the twin city to its "sister" and even in the form of manhole covers .

Sometimes political considerations influence the establishment or cancellation of a twin city alliance. For example, in 2023 the municipality of Barcelona, Spain decided to cancel the twin cities alliance with the city of Tel Aviv, Israel because of the ongoing Israeli occupation.