There are more than 1,000 members of Brethren assemblies only in Chişinău.

Darby traveled widely in Europe and Britain in the 1830s and 1840s, and established many Brethren assemblies.

He regularly visited Brethren assemblies around the world, not only in the course of his work, but also for specific occasions.

He attended the Brethren assembly in Galashiels, and functioned as a Bible teacher among the assemblies of this Christian community.

Bull also had a worldwide Bible teaching ministry in Brethren assemblies and beyond.

Wigram travelled in the UK preaching and teaching in large Brethren assemblies.

Besides travel he maintained a wide correspondence with labourers in emerging Brethren assemblies.

Wigram contributed to the hymnology of the Brethren assemblies in a number of ways.

Each Brethren assembly is independent in its administration and are not governed by a larger policy making body or federation.

The following agencies organise and coordinate work between the various Brethren assemblies: