Jurisdiction — In general — Territorial — Exemptions from and retrictions upon jurisdiction — Foreign States — Claim for repairs to Embassy — Whether claim can be brought in German Federal Court — Absolute State immunity — Restricted State immunity — Distinction between acta jure imperii and acta jure gestionis — Whether based on purpose of activity or on link between activity and sovereign functions of State or on whether activity gainful or not — Whether decisive factor nature of activity and legal relationship resulting therefrom — Whether characterization of activities as sovereign or non-sovereign determined by international law or municipal law — The law of the Federal Republic of Germany.